Complete List of All U.S. Nuclear Weapons

Last changed 30 March 2023

If a weapon name is an active link, click on it to see a picture of the weapon, or a page on it (if one exists).

Desig-
nation Type Width
(in.) Length
(in.) Weight
(lb.) Yield(s) Fuzing Laboratory Deployment
Status Comments

Mk-I Bomb 28 120 8,900 15 - 16 kT Airburst Los Alamos/ Project Y Used in combat (Hiroshima) 8/6/1945, never stockpiled; only 5 bomb assemblies completed, all retired by Nov 1950 Gun-assembly HEU bomb; "Little Boy" dropped on Hiroshima

Mk-II Bomb Los Alamos/ Project Y Theoretical design, never produced Low-efficiency plutonium implosion bomb

Mk-III Bomb 60.25 128 10,300 18, 20-23, 37, 49 kT Airburst Los Alamos/ Project Y Used in combat (Nagasaki) 8/9/1945; mass production 4/47-4/49, 120 produced; all retired late 1950 Plutonium implosion bomb; "Fat Man", Model 1561; Mods 0, 1, 2

Mk-4 Bomb 60 128 10,800 - 10,900 1, 3.5, 8, 14, 21, 22, 31 kT Airburst LASL Entered service 3/49; produced 3/49-5/51; 550 produced (all mods);
Retired 7/52-5/53 Implosion fission bomb; redesigned weapon based on Mk-III Mod 1; first IFI weapon; first assembly-line produced nuclear weapon; used type C and D pits, composite Pu-HEU cores; 3 mods

T-1 / TX-1 Atomic Demolition Munition About 8 ? About 150 Low kiloton Time delay Picatinny Arsenal Entered service, withdrawn, late 1940s Developed at Picatinny Arsenal for the U.S. Army. The only U.S. nuclear weapon ever developed outside of the nuclear laboratory system. Gun-assembly HEU weapon. See footnote.

W-4 Warhead 60 90 6,500 Airburst LASL Cancelled 1951 Planned warhead for the Snark SSM cruise missile; Mk-4 bomb derivative

Mk-5 Bomb 43.75 129 - 132 3,025 - 3,175 6, 16, 55, 60, 100, 120 kT Airburst or contact LASL Entered operational stockpile 5/52;
last retired 1/63;
140 bombs (all mods) produced 92 lens high efficiency implosion bomb; used type D pit, composite cores; first weapon with major size/weight reduction over Fat Man; used as primary (1st stage) in the first thermonuclear devices; 4 mods; first weapon to use auto IFI

W-5 Warhead 39; 44 76 2,405 - 2,650; 2,600 (XW-5-X1) same as Mk-5 Airburst or surface LASL Start of manufacture 4/54 (Regulus), 7/54 (Matador);
retired 7/61 - 1/63;
35 (Regulus), 65 (Matador) produced Warhead for the Matador (MGM-1) and Regulus 1 (SSM-N-8) SSM cruise missiles; application to the Rascal air-to-surface cancelled; first missile warhead; produced by modifying stockpile Mk-5 bombs

Mk-6 Bomb 61 128 7,600 - 8,500 8, 26, 80, 154, 160 kT Airburst or contact LASL Manufactured from 7/51 to early 1955; 1100 bombs (all mods) produced; last retired 1962 Improved high-yield lightweight Mk-4; 7 mods; some Mk-4Ds were converted Mk-6 Mod 0; early mods had 32 lens implosion system, Mod 2 and later had 60 lens system

Mk-7 Bomb 30.5 183 1,645 - 1,700 8, 19, 22, 30, 31, 61 kT Airburst or contact LASL Manufactured 7/52 - 2/63; in service July 1952-1967; 1700 - 1800 produced Mk-7 "Thor"; multipurpose light weight tactical bomb; 92 lens implosion system; 6-7 yields; 10 mods, PAL A used on late mods

W-7 Warhead 30 - 30.5 54.8 - 56 900 - 1,100;
970 (W-7-X1 / X2);
983 (Betty) 90 T; 2 - 40 kT Airburst, surface, hydrostatic LASL W-7 warhead manufacture begun 12/53;
BOAR: stockpiled 1956 - 1963, 225 produced;
Corporal: stockpiled 1955 - 1965, 300 produced;
Honest John: stockpiled 1954 - 1960, 300 produced;
ADM: stockpiled 1955-1963, 300 produced;
Betty: stockpiled 6/55 - 1960, 225 produced;
Nike Hercules: cancelled 1956 Multipurpose warhead - BOAR air-surface rocket, the Corporal (M-2) and Honest John (M-3) ballistic missiles, ADM, Betty Mk 90 ASW depth bomb, Nike Hercules SAM missile warhead (W-7-X1/X2); 7 yields, 4 mods; Corporal yield 2-40 kT (several options), ADM yield low (90 T?), Betty yield 32 kT

Mk-8 Bomb 14.5 116 - 132 3,230 - 3,280 25 - 30 kT Pyrotechnic delay LASL Manufactured 11/51 - 5/53; in service 1/52 - 6/57; 40 produced (all mods) Earth penetrating weapon, gun-assembly HEU bomb, nicknamed "Elsie" (for LC - light case), 2 mods; replaced by the Mk-11

W-8 Warhead LASL Cancelled May 1955 Gun-assembly warhead, intended for use as a cratering warhead for the Regulus missile

W-9 Artillery Shell 11.02 (280 mm) 54.8 803; 850 15 kT Mechanical time delay airburst LASL Manufactured 4/52 - 11/53;
Retired 5/57; 80 produced Used in T-124, the first U.S. nuclear artillery shell; gun-assembly HEU weapon, modified TX-8; replaced 1-for-1 by W-19; only 20 280mm cannons were ever made

Mk-9 / T-4 Atomic Demolition Munition 120 - 200 Time delay LASL Stockpiled 1957;
retired 1963 The T-4 was built from recycled W-9 warheads; gun-assembly HEU weapon; replaced by W-45

Mk-10 Bomb 12 1,750; 1,500 12 - 15 kT Airburst LASL Cancelled May 1952 "Airburst Elsie", a reduced size/ weight derivative of the Mk-8; superseded by the Mk-12

Mk-11 Bomb 14 147 3,210 - 3,500 Pyrotechnic delay LASL Manufactured 1/56 - 1957; in service 1/56 - 1960; 40 produced Improved Mk-8 gun-assembly weapon, replaced Mk-8 on 1-for-1 basis; stockpiled as the "Mk-91 penetration bomb"

Mk-12 Bomb 22 155 1,100 - 1,200 12, 14 kT Timer or contact LASL Manufactured 12/54 - 2/57;
Retired 7/58 - 7/62; 250 produced High-speed fighter-bomber weapon; 92-point implosion weapon; nicknamed "Brok"; probably first weapon using beryllium tamper; 4 versions stockpiled - 2 prototypes, 2 mods

W-12 Warhead 22 900 Low kT Airburst LASL Cancelled Nov 1955 Talos (Navy)/Talos-W (Army) surface-air missile warhead

MK-13 Bomb 61 128 7,400 32 kT (Upshot - Knothole Harry shot) Airburst or contact LASL Cancelled Aug 1954 High-yield Mk-6 follow-on, 92-point implosion system; superseded by TN Mk-15/39

W-13 Warhead 58 100 6,000 - 6,500 Airburst or contact LASL Cancelled 9/1954 Early warhead intended for Snark cruise missile, Redstone ICBM; superseded by TN Mk/W-15/39

TX / MK-14 Bomb 61.4 222 - 223.5 28,954 - 29,851; 31,000 5-7 MT; 6.9 MT (Castle Union shot) Airburst LASL Stockpiled 2/54 - 10/54;
5 produced First deployed solid-fuel thermonuclear weapon; recycled into Mk-17 weapons by 9/56; used 95% enriched Li-6; 64 ft parachute

MK-15 Bomb 34.4 - 34.7; 35 136 - 140 7,600 1.69 MT (Castle Nectar), 3.8 MT (Redwing Cherokee) Airburst, contact (F/F or rtd), laydown LASL Manufactured 4/55 - 2/57;
Retired 8/61 - 4/65; 1200 produced (all mods) First "lightweight" U.S. TN bomb; used HEU secondary casing; 3 mods; 1x3 ft and 1x12 ft ribbon parachutes

W-15 Warhead 34.5 6,400 - 6,560 LASL Cancelled Feb 1957 Class "C" TN missile warhead derived from MK-15, cancelled in favor of very closely related W-39

TX-16 Bomb 61.4 296.7 39,000 - 42,000 6 - 8 MT Airburst LASL Stockpiled 1/54 - 4/54;
5 produced First deployed thermonuclear weapon; weaponized version of Ivy Mike device; only cryogenic TN weapon ever deployed

EC-17 Bomb 61.4 224.9 39,600 11 MT (Castle Romeo shot) Airburst LASL Stockpiled 4/54 - 10/54; 5 produced "Emergency Capability" weapon (deployed prototype); used natural lithium; free fall bomb

MK-17 Bomb 61.4 296.7 41,400 - 42,000 10 - 15 MT Airburst or contact (Mod 2 only) LASL Manufactured 7/54 - 11/55;
Retired 11/56 - 8/57; 200 produced Similar to MK-24, different secondary; heaviest U.S. nuclear weapon, 2nd highest yield of any U.S. weapon (along with similar Mk-24); 3 mods; Mod 2 contact fused; 1x64 ft. parachute; replaced by the Mk-36

MK-18 Bomb 60 128 8,600 500 kT (Ivy King shot) Airburst or contact LASL Manufactured 3/53 - 2/55;
Retired 1/56 - 3/56; 90 produced (all mods) Very high-yield MK-6/Mk-13 follow-on; largest pure fission bomb ever deployed; nicknamed the SOB ("Super Oralloy Bomb"); 92-point implosion system, all HEU core; 2 mods;
Retired by conversion to lower yield Mk-6 Mod 6; superseded by TN Mk-15 and Mk-28

W-19 Artillery Shell 11.02 (280 mm) 54 600 15 - 20 kT Mechanical time delay airburst LASL Production began 7/55;
Retired 1963; 80 produced Used in T-315 atomic projectile; improved W-9; gun-assembly HEU weapon

Mk-20 Bomb 60 128 6,400 LASL Cancelled Aug 1954 Improved high-yield MK-13; superseded by TN MK-15

Mk-21 Bomb 56.2; 58.5 149 - 150 15,000 - 17,700 4 - 5 MT Airburst, contact, laydown LASL Manufactured 12/55 - 7/56;
Retired 6/57 - 1//57; 275 produced (all mods) Redesigned Shrimp TN device with 95% enriched Li-6 fuel; 3 mods, all "dirty"; "clean" version tested, never deployed; Mod 1 contact fused; Mod 2 also had w/boosted primary;
Retired by conversion to Mk-36-Y1 Mod 1

W-21 Warhead 52; 145 15,000 - 16,000 LASL Cancelled For B-58, SM-64A 56 Navaho

Mk-22 Bomb 51 18,000 1 MT UCRL Cancelled April 1954 Based on the Edward Teller designed Morgenstern/Ramrod devices; cancelled following Morgenstern fizzle (Castle Koon)

W-23 Artillery Shell 16 64 1,500; 1,900 15 - 20 kT Mechanical time delay airburst LASL Production began 10/56;
Retired 10/62;
50 produced US Navy "Katie" shell; W-19 (11 inch shell) internal components adapted to 16 inch shell body

EC 24 Bomb 61 225 39,600 13.5 MT (Castle Yankee shot) Airburst LASL Stockpiled 4/54 - 10/54;
10 produced "Emergency Capability" weapon (deployed prototype); used enriched Li-6; free fall bomb

Mk-24 Bomb 61.4 296 41,400 - 42,000 10 - 15 MT Airburst LASL Manufactured 7/54 - 11/55;
Retired 9/56 - 10/56;
105 produced Similar to MK-17, different secondary; heaviest U.S. nuclear weapon, 2nd highest yield of any U.S. weapon (along with similar Mk-17); 2 mods (Mod 2 with contact burst cancelled); 1x64 ft parachute; replaced by the Mk-36

W-25 Warhead 17.35 - 17.4 25.7 - 26.6 218 - 221 1.7 kT Time delay LASL Manufactured 5/57 - 5/60;
Mod 0 retired 8/61 - 1965, all retired by 12/84;
3150 produced (all mods) MB-1 Genie AAM warhead; unboosted composite implosion warhead; first "sealed pit" weapon; 2 mods, Mod 1 had environmental sensing device safeties

Mk-26 Bomb 56.2 150 15,000 - 17,700 LASL Cancelled 1956 Mk-21 sibling design

Mk-27 Bomb 30.2 125 - 142 3,150 - 3,300 Airburst or contact UCRL Manufactured 11/58 - 6/59;
Retired 11/62 - 7/65; 700 (all mods) produced Navy TN bomb; This UCRL design was a competitor with the LASL Mk-28 to satisfy the Class "D" light weight TN bomb requirement; 3 mods

W-27 Warhead 30.25 - 31 75 2,800 2 MT Airburst or contact UCRL Manufactured 9/58 - 6/59;
retired 8/62 - 7/65;
20 produced Regulus I (SSM-N-8) SSM cruise missile warhead; considered for several other systems all of which were were cancelled: the F-101 and B-58 bomb pods, and the Rascal, Regulus II, and Matador cruise missiles

Mk-28 Bomb 20; 22 96 - 170 1,700 - 2,320 Y1: 1.1 MT,
Y2: 350 kT,
Y3: 70 kT,
Y5: 1.45 MT FUFO: F/F or retarded, airburst or contact, laydown LASL Manufactured 1/58 - 3/58, 8/58 - 5/66; retirement of early mods began 1961, last one retired 9/91; 4500 produced (all mods) Multipurpose TN tactical and strategic bomb; longest weapon design in U.S. (33 years); 2nd largest production run of any U.S. weapon design; Y4 was fission only; 20 mods and variants; PAL A (Y1), B (Y2), D (Y3, Y5); replaced by B-61 and B-83 bombs; 1-point safety problem with primary discovered after start of initial manufacture, halting production for 5 months

W-28 Warhead 20 60 1,500 - 1,725 70 kT - 1.45 MT Airburst or contact LASL Manufactured 8/58 - 5/66, entered service (Hound Dog) 1959 and (Mace) 1960;
Hound Dog retired 1/64 - 1976, Mace retired 1970;
production - 900 (Hound Dog), 100 (Mace) Warhead for the Hound Dog (AGM-28) and Mace (MGM-13) cruise missiles; 5 mods; PAL A and B

W-29 Warhead 52; 35 145 3,500 LASL Cancelled Aug 1955 Cancelled in favor of Mk-15

W-30 Warhead 22 48 438; 490; 450 300 T; 500 T (Talos and TADM); 4.7 kT; 19 kT Airburst, contact, time delay LASL TADM: stockpiled 1961 - 1966, 300 produced;
Talos: manufactured 2/59 - 1/65, retired 1/62 - 3/79; 300 produced Multipurpose warhead: Talos SAM/SSM, XW-30-X1 TADM (Tactical Atomic Demolition Munition) warhead; Talos - 1 yield, 3 mods; TADM - 2 yields stockpiled

W-31 Warhead 28 - 29; 30 39 - 39.3 900 - 945 1, 2, 12, 20, 40 kT Airburst, timer, surface LASL Honest John: manufactured 10/59 - 12/61, retired 7/67 - 1987, 1650 produced;
Nike Hercules: manufactured 10/58 - 12/61, retired 7/67 - 9/89, 2550 produced;
ADM: stockpiled 9/60 - 1965, 300 produced Multipurpose boosted fission warhead: Honest John SSM, Nike Hercules SAM, ADM (Atomic Demolition Munition);
Versions used: Honest John: W-31 Mod 0, 3; Nike-Hercules: W-31 Mod 0, 2; ADM: Mk-31 Mod 1;
4 yields stockpiled: 2 for Nike-Hercules, 3 for Honest John (2, 20, and 40 kT)

W-32 Artillery Shell 9.45 (240 mm) 400; 450 LASL Cancelled May 1955

W-33 Artillery Shell 8 (203 mm) 37 240 - 243 5 - 10 kT, 40 kT (Y2) Mechanical time delay airburst LASL Manufactured 1/57 - 1/65;
Retired 9/92; 2000 produced W-33 used in the T-317 atomic projectile; gun-assembly HEU weapon; used titanium to reduce weight and size; 4 yields (Y1 - Y4) using different internal HEU assemblies, high yield variant may be boosted; 2 mods

W-34 ASW warhead / Bomb 17 32 312; 320; 311 11 kT Hydrostatic, laydown, impact LASL ASW: Manufactured 8/58 - 12/62;
retired 7/64 - 1971 (Lulu), 7/64 - 1976 (Astor);
2000 Lulu, 600 Astor produced;
Hotpoint: Manufactured 6/58 - 9/62;
Retired by 1965;
600 produced Multipurpose warhead for ASW (antisubmarine warfare) and tactical use; ASW: Mk-34 Lulu depth bomb, Mk-44 Astor torpedo; tactical: Mk-105 Hotpoint bomb, first parachute retarded laydown weapon; 2 mods; boosted fission implosion device identical to the Mk-28 primary

W-35 Warhead 20; 28 1,500 - 1,700 1.75 MT LASL Cancelled Aug 1958 Early LASL TN ballistic missile warhead, intended for Atlas, Titan ICBMs, Thor, Jupiter IRBMs; competitor with UCRL W-38; cancelled in favor of W-49 (a modified Mk-28)

Mk-36 Bomb 56.2; 58; 59 150 17,500; 17,700 9 - 10 MT F/F or retarded airburst or contact LASL Manufactured 4/56 - 6/58;
Retired 8/61 - 1/62; 940 produced (all mods) Two-stage TN strategic bomb; Y1 "dirty," Y2 "clean", each in two mods; parachutes 1x5 ft, 1x24 ft ribbon; all Mk-21s converted to Mk-36 in 1957;
Retired in favor of Mk-41; at retirement this weapon represented almost half of the megatonnage of the U.S. arsenal

W-37 Warhead 30 900; 940 LASL Cancelled 9/1956 Intended to be a high-yield multipurpose companion to the W-31; XW-37 was redesignated XW-31Y2

W-38 Warhead 32 82.5 3,080 3.75 MT Airburst or contact UCRL/LRL Manufactured 5/61 - 1/63; retired 1/65 - 5/65; Production: 110 (Atlas), 70 (Titan) Warhead for Atlas E/F and Titan I ICBMs; used Avco Mk 4 RV; first UCRL/LRL designed TN ballistic missile warhead; competitor with LASL W-35/49

Mk-39 Bomb 35, 44 (tail section) 136 - 140 6,650 - 6,750 3-4 MT (2 yields, Y1 and Y2) Airburst, contact; mod w/low-level retarded laydown LASL Manufactured 2/57 - 3/59;
Retired 1/62 to 11/66; 700 produced (all mods) Improved Mk-15, Mk-39 Mod 0 same as TX-15-X3; used gas-boosted primary to reduce weight; thermal batteries, improved safeties; 3 mods; parachutes: 1x6 ft, 1x28 ribbon, 1x100 ft

W-39 Warhead 34.5 - 35 105.7 6,230 - 6,400 3.8 MT (2 yields, Y1 and Y2) LASL Redstone: stockpiled 7/58 - 1963, 60 produced;
Snark: manufactured 4/58 - 7/58, retired 8/62 - 9/65, 30 produced Warhead for Snark cruise missile, Redstone MRBM, B-58 weapon pod;
Versions: Redstone Mk-39Y1 Mod 1 and Mk-39Y2 Mod 1, Snark Mk-39Y1 Mod 1; W-39 identical to Mk-39 except for fuzing system

W-40 Warhead 17.9 31.64 350; 385 (Y1) 10 kT (Y1) Airburst or contact LASL Bomarc: manufactured 9/59 - 5/62, retired by 11/72, 350 produced;
Lacrosse: manufactured 9/59 - 5/62, retired 10/63 - 1964, 400 produced Warhead for Bomarc SAM and Lacrosse SSM; boosted implosion system adapted from Mk-28 primary; initially deployed version (produced 6/59-8/59) not 1-point safe, Mod 2 retrofit required; 2 yields

Mk-41 Bomb 52 148 10,500 - 10,670 25 MT FUFU: F/F or retarded, airburst or contact, laydown UCRL/LRL Manufactured 9/60 - 6/62;
Retired 11/63 - 7/76; 500 produced Highest yield U.S. weapon ever deployed; only U.S. 3-stage TN weapon; Y1 "dirty," Y2 "clean"; parachutes 1x4 ft, 1x16.5 ft;
retired in favor of Mk-53

W-41 Warhead 50 9,300 UCRL/LRL Cancelled July 1957

W-42 Warhead 13 - 14 18.5 75 - 92 Proximity LASL Cancelled June 1961 Intended for air-to-air (e.g. GAR-8), surface-to-air (e.g. Hawk) applications

Mk-43 Bomb 18 150 - 164 2,060 - 2,125 70 kT - 1 MT;
Y1: 1 MT,
Y5: 500 kT F/F or retarded, airburst or contact, laydown LASL Manufactured 4/61 - 10/65;
retirement (early mods) began 12/72, last retired 4/91;
1000 produced (all mods) Laydown bomb for high-speed low-altitude delivery; 5 yields; Y4 is fission only; PAL B (mod 2); Parachutes: 1x4 ft, 1x23 ft ribbon; last version retired was MK-43Y2 Mod 2

W-44 ASW warhead 13.75 25.3 170 10 kT Hydrostatic LASL Manufactured 5/61 - 3/68;
retired 6/74 - 9/89;
575 produced ASROC (RUR-5A) ASW warhead; plutonium implosion warhead, similar to primary for Mk-43

W-45 Warhead 11.5 27 150;
MADM: 350 500 T; 1, 5, 8, 10, 15 kT Airburst, surface, time delay, command UCRL/LRL Terrier: manufactured 4/62 - 6/66, retired 7/67 - 9/88, 750 produced;
MADM: manufactured 1/62 - 6/66, retired 7/67 - 1984, 350 produced;
Bullpup: manufactured 1/62 - 1963, retired 7/67 - 1978, 100 produced;
Little John: manufactured 9/61 - 6/66, retired 7/67 - 1970, 500 produced Multipurpose UCRL/LRL designed tactical warhead; small implosion design; Y1 (1 kT): Little John SSM, Terrier SAM, MADM (Medium ADM); Y2: Little John, MADM; Y3 (unboosted): GAM-83B Bullpup ASM, MADM; Y4 (boosted, 1 kT): Bullpup, Little John, Terrier, MADM

Mk-46 Bomb 37 6,400 MT range LASL Cancelled Oct 1958 "Clean" and "dirty" versions tested during Hardtack I; was to have replaced Mk-39; development of improved design continued as Mk-53

W-46 Warhead 35-40 LASL Cancelled April 1958 Warhead planned for Redstone, Snark, B-58 pod warhead; Redstone/W-46 cancelled in favor of Titan II/W-53

W-47 Warhead 18 46.6 Y1: 717 - 720;
Y2: 733 Y1: 600 kT;
Y2: 1.2 MT Airburst or contact LASL EC-47 manufactured 4/60 - 6/60, retired 6/60, 300 produced;
W-47 manufactured 6/60 - 7/64, retired 7/61 - 11/74, 1060 produced (Y1 and Y2) - only 300 in service at a time Polaris SLBM TN warhead; breakthrough in compact, light high yield design; integral warhead/beryllium re-entry vehicle; 3 versions: EC-47, W-47Y1, W-47Y2; several severe reliability problems required repeated modification and remanufacture (in 1966 75% of the stockpiled Y2s were inoperable, correction took until 10/67)

W-48 Artillery Shell 6.1 (155 mm) 33.3 118 - 128 72 T Mechanical time delay or proximity airburst, or contact UCRL/LRL Manufactured 10/63 - 3/68; retirement (135 Mod 0s) 1/65 - 1969, all 925 Mod 1s retired 1992; 1060 produced (all mods) Small diameter linear implosion plutonium weapon, 2 mods

W-49 Warhead 20 54.3 - 57.9 1,640 - 1,680 1.44 MT Airburst or contact LASL Manufactured 9/58 - 1964;
Thor retired 11/62 - 8/63 (a few to 4/75);
LASL developed ICBM/IRBM warhead; Used in Thor (Mod 0,1, 3), Atlas (Mod 0, 1), Titan, Jupiter (Mod 0, 1, 3, 5) warhead; 2 RVs used Mk-2 heat sink and Mk-3 ablative; 2 yields, 7 mods; Mk/W-28 adaptation with new arming/fuzing system; PAL A; successor to W-35

W-50 Warhead 15.4 44 409 - 410 Y1: 60 kT;
Y2: 200 kT;
Y3: 400 kT Airburst or contact LASL Manufactured 3/63 - 12/65;
retired 4/73 - 4/91;
280 produced TN warhead for Pershing SSM (Mod 1, 2), Nike Zeus SAM (cancelled 5/59); Mod 1 equipped with PAL A; 3 yields, 2 mods

W-51 Warhead 22 T LRL Became XW-54 Jan 1959 Very small spherical implosion warhead, initial development by LRL, development transferred to LASL and design redesignated W-54

W-52 Warhead 24 56.7 950 200 kT Airburst or contact LASL Manufactured 5/62 - 4/66;
retired 3/74 - 8/78;
300 produced Sergeant SSM warhead; 2 yields, 3 mods; PAL A (Mod 2); warhead test in 1963 showed Mods 1 and 2 to be useless, Mod 3 was first to achieve rated yield

Mk/B53 Bomb 50 148 - 150;
Y2 144 8,850 - 8,900 9 MT FUFO: F/F or retarded, airburst or contact, laydown LASL Manufactured 8/62 - 6/65; 350 produced; retirement (early mods) began 7/67, last 50 retired from active service (but retained in stockpile) in favor of B-61 Mod 11, early 1997. Carried by B-47, B-52; B-58 used Mk-53BA (in BLU-2/B pod); 4 mods, Y1 "dirty" version, Y2 "clean" version; fissile material all HEU, no plutonium; parachutes: 1x4 ft, 1x16.5 ft ribbon, 3x48 ft ribbon; last unit dismantled 25 October 2011.

W-53 Warhead 37 103 6,200 9 MT Airburst or contact LASL Titan II warhead

W-54 Warhead 10.75 15.7 50 - 51 250 T Contact or proximity LASL Manufactured 4/61 - 2/65; retired 7/67 - 4/72; 1000 - 2000 produced GAR-11/AIM-26A Falcon AAM warhead; originally called "Wee Gnat"; adaptation of Mk-54

Mk-54 Warhead 10.75 17.6 50 - 55 10, 20 T Time delay LASL Manufactured 4/61 - 2/65;
retired 7/67 - 1971;
400 produced Warhead for Davy Crockett M-388 recoilless rifle projectile; 2 yields; 2 mods; very light, compact spherical implosion plutonium warhead

Mk-54 SADM Atomic Demolition Munition (ADM) 16 24 150 (complete);
59 (W-54 only) Variable, 10 T - 1 kT Time delay LASL Manufactured 8/64 - 6/66;
retired 1967 - 1989;
300 produced
SADM: M-129/M-159 SADM (Special Atomic Demolition Munition) used a Mk-54 warhead package very similar to Davy Crockett; 2 mods; mechanical combination lock PAL

W-55 ASW 13 39.4 470 Mid Kiloton Range Hydrostatic LASL Manufactured 1/64 - 3/68, 3/70 - 4/74;
retired 6/83 - 9/90;
285 produced SUBROC (UUM-44A) ASW missile thermonuclear warhead; based on the 202 kT Hardtack I Olive device

W-56 Warhead 17.4 47.3 600; 680 1.2 MT Airburst or surface LASL Manufactured 3/63 - 5/69;
retired 9/66 (early mods), Mod-4 retired 1991-93;
1000 produced (all mods), 455 Mod-4s produced Minuteman I and II warhead, based on UCRL W-47, competitor with the W-59 for Minuteman; 4 mods, retrofit of early mods required to fix reliability problem, blast and radiation hardening added later

Mk-57 Bomb 14.75 118 490 - 510 5 - 20 kT Retarded airburst, retarded laydown, F/F contact, hydrostatic LASL Manufactured 1/63 - 5/67; retirement (early mods) started 6/75, last retired 6/93; 3,100 produced Light weight multipurpose tactical strike/depth bomb; boosted implosion fission weapon; modular design, 6 mods; PAL B; 1x12.5 ft ribbon parachute;
Retired in favor of B-61

W-58 Warhead 15.6 40.3 257 200 kT Airburst or contact LASL Manufactured 3/64 - 6/67; retired 9/68-4/82; 1400 produced Polaris A-3 warhead, each A-3 carried three multiple re-entry vehicles (MRVs), first MRV warhead in service

W-59 Warhead 16.3 47.8 550 - 553 1 MT Airburst or contact LASL Manufactured 6/62 - 7/63;
retired 12/64 - 6/69;
150 produced Warhead for Minuteman I/Mk 5 RV and the cancelled Skybolt; version of LASL "J-21" design;

W-60 Warhead 13 20 115 - 150 Very low Proximity LASL Cancelled Dec 1963 Typhon SAM warhead

Mk/B-61 Bomb 13.3 141.64 695 - 716 Variable. In service:
Mod 3: 0.3, 1.5, 60, 170 kT;
Mod 4: 0.3, 1.5, 10, 45 kT;
Mod 7/11: 4 yields, 10 - 340 kT;
Mod 10: 0.3, 5, 10, 80 kT;
Mod 12: 0.3, 1.5, 10, 50 kT FUFO: retarded and F/F, contact or airburst, laydown LANL Manufactured 10/66 - early 90s; early mods retired 70s - 80s; 3150 produced, 1350 in service; Mod 12 production (Mod 4 conversion) began 11/21 Multipurpose tactical/strategic bomb; basic design adapted to many other weapon systems; DAY (Dial-A-Yield); 12 mods, 6 in stockpile, 5 in active service; PAL B (retired), D, F; primary uses IHE; parachute: 1x17 ft or 1x24 ft ribbon; longest production run of any U.S. nuclear weapon, oldest design in service; part of the U.S. Enduring Stockpile.

W-62 Warhead RV Body: 21 in;
Warhead: 19.7 in RV Body: 72 in;
Warhead: 39.3 in Warhead/RV: 700-800; Warhead: 253 170 kT Airburst or contact LRL Manufactured 3/70 - 6/76;
early mods retired starting 4/80;
1725 produced Minuteman III/Mk-12 RV warhead; remaining W-62s replaced by W-88s in 2010 and dismantled.
W-63 Warhead LASL Cancelled Nov 1966 LRL design for Lance SSM warhead; ER ("neutron bomb") design; (cancelled in favor of W-70

W-64 Warhead LASL Cancelled Sep 1964 LASL design for Lance SSM warhead; ER ("neutron bomb") design; cancelled in favor of W-63

W-65 Warhead MT range LASL Cancelled Jan 1968 Sprint ABM warhead, cancelled in favor of W-66

W-66 Warhead 18 35 150 kT range LASL Manufactured 6/74 - 3/75;
retired from service 8/75, ret. from stockpile 1985;
70 produced Sprint ABM warhead, ER ("neutron bomb") warhead

W-67 Warhead Warhead/RV: 938; Warhead 675 150 kT LASL Cancelled Dec 1967 LASL ICBM/SLBM multiple warhead, intended for Poseidon and Minuteman-III. Mark 17 RV

W-68 Warhead 367 40 - 50 kT Airburst or contact LRL Manufactured 6/70 - 6/75; retired 9/77 - 1991; 5250 produced Poseidon Mk-3 RV warhead, each missile carried 10 RVs; aging problems with explosive required complete rebuilding of stockpile 11/78-83 (3200 rebuilt, others retired); largest production run of any U.S. warhead

W-69 Warhead 15 30 275 170 - 200 kT Airburst or contact LASL Manufactured 10/71 - 8/76;
retired 10/91 - 9/94;
1500 produced SRAM (short range attack missile, AGM 69A) air-surface missile warhead; derived from Mk-61; initially removed from service 6/90 due to fire safety concerns

W-70 Warhead 18 41 270 Mods 0,1, 2: variable from 1-100 kT;
Mod 3: 1 kT Airburst or contact LRL Manufactured 6/73 - 7/77 (Mods 0-2), 8/81 - 2/83 (Mod 3);
retired 7/79 - 9/92;
Mods 0-2: 900 produced, Mod 3: 380 built Lance SSM warhead; LRL successor to W-63 design; 4 mods; Mods 0, 1, 2: TN warhead with 3 yield settings (1-100 kT), Mod 1 had improved selection of yields; Mod 3: enhanced radiation ("neutron bomb") version, 2 yield options (slightly less than 1 kT, and slightly more than 1 kT), both 60% fusion and 40% fission; PAL D

W-71 Warhead 42 101 2,850 5 MT Airburst (command & delay timer) LRL Manufactured 7/74 - 7/75;
retired from service 1975, ret. from stockpile 9/92;
30 produced Spartan ABM warhead, used thermal x-rays for exoatmospheric RV kill

W-72 Warhead 15 79 825 ca. 600 T Contact LASL Manufactured 8/70 - 4/72;
retired 7/79 - 9/79;
300 produced Walleye (AGM-62) guided glide bomb warhead; W-72 was a modified W-54, salvaged from retired AIM-26A Falcon AAM; yield was significantly enhanced over Falcon version

W-73 Warhead <17 LASL Cancelled 9/1970 Condor ASM warhead; derived from Mk-61; cancelled in favor of a conventional HE warhead

W-74 Artillery Shell 6.1 (155 mm) 2 yields (both >100 T) LASL Cancelled June 1973 Linear implosion pure fission plutonium warhead; intended to replace W-48

W-75 Artillery Shell 8 (203 mm) 100 T LRL Cancelled 1973 "Big brother" of W-74, similar design

W-76 Warhead 363 100 kT (Mod 0), 90 kT (Mod 1), 5-7 kT (Mod 2) Airburst or contact LASL/ LANL Manufactured 6/78 - 7/87; W76-1 LEP 9/08-12/18; W76-2 1/19-2024
active service;
approx. 3000 produced, 2000 modified to Mod 1, ~25 Mod 2 Trident I and Trident II Mk-4 RV (Mod 0), Mk-4A (Mods 1 and 2), missiles can carry up to 14 RVs; oldest missile warhead in service; part of the U.S. Enduring Stockpile.

B-77 Bomb 18 144 2,400 Variable, kT to MT range FUFO LASL Cancelled Dec 1977 High yield strategic TN bomb, intended to replace Mk-28 and Mk-43; PAL D; costly, heavy delivery system lead to cancellation, warhead design continued with B-83

W-78 Warhead 21.25 67.7 400 - 600 335 - 350 kT Airburst or contact LASL/ LANL Manufactured 8/79 - 10/82;
active service;
1083 produced, ~600 active service Minuteman III/Mk-12A RV warhead; design derived from W-50 with a new lighter primary; part of U.S. Enduring Stockpile. To be retired for W87 Mod-1 when Minuteman replacement is deployed ~2030.

W-79 Artillery Shell 8 44 200 Variable - 100 T to 1.1 kT (Mod 0), 0.8 kT (Mod 1) Proximity airburst or contact LLNL Manufactured 7/81 - 8/86; ER version retirement started mid-80s, all retired 9/92; 550 (325 ER, 225 fission) produced Plutonium linear implosion weapon, used in XM-753 atomic projectile (AFAP); Mod 0: dual capable - pure fission or enhanced radiation (ER of "neutron bomb"), 3 yield options; Mod 1: fission only; PAL D

W-80-0 Warhead 11.8 31.4 290 Variable: 5 kT and 170-200 kT Airburst or contact LANL Manufactured 12/83 - 9/90;
active service;
367 produced SLCM warhead; uses supergrade plutonium; PAL D; derived from Mk/B-61 warhead; now stored ashore; part of the U.S. Enduring Stockpile

W-80-1 Warhead 11.8 31.4 290 Variable: 5 kT and 150-170 kT Airburst or contact LANL Manufactured 1/81 - 9/90;
active service;
1750 produced, 1400 in service Warhead for ALCM (1000 in service), ACM (400 in service); PAL D; derived from Mk/B-61 warhead; part of the U.S. Enduring Stockpile

W-81 Warhead <13.5 2 - 4 kT LANL Cancelled 1986 USN Standard SM-2 SAM warhead; PAL F; variant of Mk/B-61 warhead, enhanced radiation version initially planned, later converted to fission only

W-82 Artillery Shell 6.1 (155 mm) 34 95 <2 kT Airburst LANL W-82-0 cancelled in Oct 1983; W-82-1 cancelled in 9/1990
155 mm companion to the the W-79, for use in XM-785 atomic projectile (AFAP); original Mod 0: dual capable - pure fission or enhanced radiation; Mod 1: fission only; PAL D

B-83 Bomb 18 145 2,400 Variable, low kT to 1.2 MT FUFO: F/F or retarded, airburst or contact, laydown LLNL Manufactured 6/83 - 1991;
active service;
650 produced Current high-yield strategic TN bomb; PAL D; uses IHE, fire resisitant pit; parachutes: 3x4 ft, 1x46 ft; 1x5 ft, 1x46 ft. To be retired under the 2022 Nuclear Policy Review.

W-83 Warhead 1,700 - 1,900 LLNL PAL D

W-84 Warhead 13 34 388 Variable: 0.2 - 150 kT Airburst or contact LLNL Manufactured 9/83 - 1/88;
inactive stockpile;
300-350 produced GLCM warhead, missile scrapped under INF Treaty; LLNL design derived from LANL Mk/B-61 Mod 3/4 warhead; safety features: IHE, PAL G; FRP, ENDS, Command Disable. Part of the U.S. Enduring Stockpile as inactive reserve weapons

W-85;
alternate image Warhead 12.5 42 880 Variable: 5 - 80 kT Airburst or contact LANL Manufactured 2/83 - 7/86;
retired 1988 - 3/91;
120 produced Pershing II SSM warhead; derived from LANL Mk/B-61 Mod 3/4 warhead; uses IHE, PAL F; upon retirement the W-85 was recycled into B-61 Mod 10 bombs

W-86 Warhead Delayed LASL Cancelled 9/1980 Earth penetrating warhead for the Pershing II SSM, cancelled due to change in mission from hard to soft targets

W-87-0 Warhead 21.8 68.9 500 - 600; 440 300 kT Timer or proximity airburst, contact LLNL Manufactured 7/86 - 12/88;
active service;
525 produced Initially deployed on Peacekeeper ICBM/Mk-21 RV (carried 10), now deployed on Minuteman III (with W-78); RV/warhead weighs 800 lb; primary uses IHE and fire resistant pit; part of the U.S. Enduring Stockpile.

W-87-1 Warhead 21.8 68.9 500 - 600; 440 475 kT Timer or proximity airburst, contact LLNL Manufacture to start ~2030
Phase 6.3 development
None produced Phase 6.4 Production Engineering planned for mid 2026, Phase 6.5 Initial Production planned for 2030. Will replace W78 when Minuteman III is retired (~2030).

W-88 Warhead 21.8 68.9 <800 475 kT Timer (w/path length correction) and proximity airburst; contact LANL Manufactured 9/88 - 11/89; active service;
~400 produced Trident II Mk-5 RV warhead; does not use IHE; uses HEU jacket with secondary stage; production terminated by FBI raid on Rocky Flats; part of the U.S. Enduring Stockpile

W-89 Warhead 13.3 40.8 324 200 kT Airburst or contact LANL Cancelled 9/1991 SRAM (short range attack missile) II warhead; LLNL design; safety features: PAL D, IHE, FRP; also considered for Sea Lance ASW missile

B 90 Bomb 13.3 118 780 200 kT retarded airburst, retarded contact, F/F airburst, F/F contact, hydrostatic LANL Cancelled 1991 USN nuclear strike/depth bomb; intended to replace Mk-57; PAL D; 1x26 ft parachute

W-91 Warhead 310 10, 100 kT LANL Cancelled 9/1991 SRAM-T (short range attack missile - tactical) warhead; SRAM-T was a SRAM II derivative for the F-15E Eagle fighter/bomber; design orignally called "New Mexico 1"; safety features: FRP, IHE; 2 yields

W-92 Warhead LANL Cancelled 1990 Sealance (proposed). Never entered Phase 3 (Development Engineering).

RNEP Bomb Sub-kT to MT Study start 4/2002; FY2005/FY2006 funding denied, no further request. Robust Nuclear Earth Penetrator (proposed). Modifications of B-83 and B-61 bombs considered. Never entered Phase 2A (Design Definition and Cost Study). No formal military requirement prepared.

RRW-1 Warhead Cancelled RRW-1 Reliable Replacement Warhead-SLBM (proposed). Never entered Phase 2A (Design Definition and Cost Study).

RRW-2 Bomb Cancelled RRW-2 Reliable Replacement Warhead-Bomb (proposed). Never entered Phase 2A (Design Definition and Cost Study).

W-93 Warhead Unknown Unknown Unknown Unknown Similar or the same as for the W-88 LANL Phase 2A design start 2/2020. Projected availability 2030. SLBM warhead; based on currently tested designs and components already in the stockpile, but enhanced safety.

Desig- nation	Type	Width (in.)	Length (in.)	Weight (lb.)	Yield(s)	Fuzing	Laboratory	Deployment Status	Comments
Mk-I	Bomb	28	120	8,900	15 - 16 kT	Airburst	Los Alamos/ Project Y	Used in combat (Hiroshima) 8/6/1945, never stockpiled; only 5 bomb assemblies completed, all retired by Nov 1950	Gun-assembly HEU bomb; "Little Boy" dropped on Hiroshima
Mk-II	Bomb						Los Alamos/ Project Y	Theoretical design, never produced	Low-efficiency plutonium implosion bomb
Mk-III	Bomb	60.25	128	10,300	18, 20-23, 37, 49 kT	Airburst	Los Alamos/ Project Y	Used in combat (Nagasaki) 8/9/1945; mass production 4/47-4/49, 120 produced; all retired late 1950	Plutonium implosion bomb; "Fat Man", Model 1561; Mods 0, 1, 2
Mk-4	Bomb	60	128	10,800 - 10,900	1, 3.5, 8, 14, 21, 22, 31 kT	Airburst	LASL	Entered service 3/49; produced 3/49-5/51; 550 produced (all mods); Retired 7/52-5/53	Implosion fission bomb; redesigned weapon based on Mk-III Mod 1; first IFI weapon; first assembly-line produced nuclear weapon; used type C and D pits, composite Pu-HEU cores; 3 mods
T-1 / TX-1	Atomic Demolition Munition	About 8	?	About 150	Low kiloton	Time delay	Picatinny Arsenal	Entered service, withdrawn, late 1940s	Developed at Picatinny Arsenal for the U.S. Army. The only U.S. nuclear weapon ever developed outside of the nuclear laboratory system. Gun-assembly HEU weapon. See footnote.
W-4	Warhead	60	90	6,500		Airburst	LASL	Cancelled 1951	Planned warhead for the Snark SSM cruise missile; Mk-4 bomb derivative
Mk-5	Bomb	43.75	129 - 132	3,025 - 3,175	6, 16, 55, 60, 100, 120 kT	Airburst or contact	LASL	Entered operational stockpile 5/52; last retired 1/63; 140 bombs (all mods) produced	92 lens high efficiency implosion bomb; used type D pit, composite cores; first weapon with major size/weight reduction over Fat Man; used as primary (1st stage) in the first thermonuclear devices; 4 mods; first weapon to use auto IFI
W-5	Warhead	39; 44	76	2,405 - 2,650; 2,600 (XW-5-X1)	same as Mk-5	Airburst or surface	LASL	Start of manufacture 4/54 (Regulus), 7/54 (Matador); retired 7/61 - 1/63; 35 (Regulus), 65 (Matador) produced	Warhead for the Matador (MGM-1) and Regulus 1 (SSM-N-8) SSM cruise missiles; application to the Rascal air-to-surface cancelled; first missile warhead; produced by modifying stockpile Mk-5 bombs
Mk-6	Bomb	61	128	7,600 - 8,500	8, 26, 80, 154, 160 kT	Airburst or contact	LASL	Manufactured from 7/51 to early 1955; 1100 bombs (all mods) produced; last retired 1962	Improved high-yield lightweight Mk-4; 7 mods; some Mk-4Ds were converted Mk-6 Mod 0; early mods had 32 lens implosion system, Mod 2 and later had 60 lens system
Mk-7	Bomb	30.5	183	1,645 - 1,700	8, 19, 22, 30, 31, 61 kT	Airburst or contact	LASL	Manufactured 7/52 - 2/63; in service July 1952-1967; 1700 - 1800 produced	Mk-7 "Thor"; multipurpose light weight tactical bomb; 92 lens implosion system; 6-7 yields; 10 mods, PAL A used on late mods
W-7	Warhead	30 - 30.5	54.8 - 56	900 - 1,100; 970 (W-7-X1 / X2); 983 (Betty)	90 T; 2 - 40 kT	Airburst, surface, hydrostatic	LASL	W-7 warhead manufacture begun 12/53; BOAR: stockpiled 1956 - 1963, 225 produced; Corporal: stockpiled 1955 - 1965, 300 produced; Honest John: stockpiled 1954 - 1960, 300 produced; ADM: stockpiled 1955-1963, 300 produced; Betty: stockpiled 6/55 - 1960, 225 produced; Nike Hercules: cancelled 1956	Multipurpose warhead - BOAR air-surface rocket, the Corporal (M-2) and Honest John (M-3) ballistic missiles, ADM, Betty Mk 90 ASW depth bomb, Nike Hercules SAM missile warhead (W-7-X1/X2); 7 yields, 4 mods; Corporal yield 2-40 kT (several options), ADM yield low (90 T?), Betty yield 32 kT
Mk-8	Bomb	14.5	116 - 132	3,230 - 3,280	25 - 30 kT	Pyrotechnic delay	LASL	Manufactured 11/51 - 5/53; in service 1/52 - 6/57; 40 produced (all mods)	Earth penetrating weapon, gun-assembly HEU bomb, nicknamed "Elsie" (for LC - light case), 2 mods; replaced by the Mk-11
W-8	Warhead						LASL	Cancelled May 1955	Gun-assembly warhead, intended for use as a cratering warhead for the Regulus missile
W-9	Artillery Shell	11.02 (280 mm)	54.8	803; 850	15 kT	Mechanical time delay airburst	LASL	Manufactured 4/52 - 11/53; Retired 5/57; 80 produced	Used in T-124, the first U.S. nuclear artillery shell; gun-assembly HEU weapon, modified TX-8; replaced 1-for-1 by W-19; only 20 280mm cannons were ever made
Mk-9 / T-4	Atomic Demolition Munition			120 - 200		Time delay	LASL	Stockpiled 1957; retired 1963	The T-4 was built from recycled W-9 warheads; gun-assembly HEU weapon; replaced by W-45
Mk-10	Bomb	12		1,750; 1,500	12 - 15 kT	Airburst	LASL	Cancelled May 1952	"Airburst Elsie", a reduced size/ weight derivative of the Mk-8; superseded by the Mk-12
Mk-11	Bomb	14	147	3,210 - 3,500		Pyrotechnic delay	LASL	Manufactured 1/56 - 1957; in service 1/56 - 1960; 40 produced	Improved Mk-8 gun-assembly weapon, replaced Mk-8 on 1-for-1 basis; stockpiled as the "Mk-91 penetration bomb"
Mk-12	Bomb	22	155	1,100 - 1,200	12, 14 kT	Timer or contact	LASL	Manufactured 12/54 - 2/57; Retired 7/58 - 7/62; 250 produced	High-speed fighter-bomber weapon; 92-point implosion weapon; nicknamed "Brok"; probably first weapon using beryllium tamper; 4 versions stockpiled - 2 prototypes, 2 mods
W-12	Warhead	22		900	Low kT	Airburst	LASL	Cancelled Nov 1955	Talos (Navy)/Talos-W (Army) surface-air missile warhead
MK-13	Bomb	61	128	7,400	32 kT (Upshot - Knothole Harry shot)	Airburst or contact	LASL	Cancelled Aug 1954	High-yield Mk-6 follow-on, 92-point implosion system; superseded by TN Mk-15/39
W-13	Warhead	58	100	6,000 - 6,500		Airburst or contact	LASL	Cancelled 9/1954	Early warhead intended for Snark cruise missile, Redstone ICBM; superseded by TN Mk/W-15/39
TX / MK-14	Bomb	61.4	222 - 223.5	28,954 - 29,851; 31,000	5-7 MT; 6.9 MT (Castle Union shot)	Airburst	LASL	Stockpiled 2/54 - 10/54; 5 produced	First deployed solid-fuel thermonuclear weapon; recycled into Mk-17 weapons by 9/56; used 95% enriched Li-6; 64 ft parachute
MK-15	Bomb	34.4 - 34.7; 35	136 - 140	7,600	1.69 MT (Castle Nectar), 3.8 MT (Redwing Cherokee)	Airburst, contact (F/F or rtd), laydown	LASL	Manufactured 4/55 - 2/57; Retired 8/61 - 4/65; 1200 produced (all mods)	First "lightweight" U.S. TN bomb; used HEU secondary casing; 3 mods; 1x3 ft and 1x12 ft ribbon parachutes
W-15	Warhead	34.5		6,400 - 6,560			LASL	Cancelled Feb 1957	Class "C" TN missile warhead derived from MK-15, cancelled in favor of very closely related W-39
TX-16	Bomb	61.4	296.7	39,000 - 42,000	6 - 8 MT	Airburst	LASL	Stockpiled 1/54 - 4/54; 5 produced	First deployed thermonuclear weapon; weaponized version of Ivy Mike device; only cryogenic TN weapon ever deployed
EC-17	Bomb	61.4	224.9	39,600	11 MT (Castle Romeo shot)	Airburst	LASL	Stockpiled 4/54 - 10/54; 5 produced	"Emergency Capability" weapon (deployed prototype); used natural lithium; free fall bomb
MK-17	Bomb	61.4	296.7	41,400 - 42,000	10 - 15 MT	Airburst or contact (Mod 2 only)	LASL	Manufactured 7/54 - 11/55; Retired 11/56 - 8/57; 200 produced	Similar to MK-24, different secondary; heaviest U.S. nuclear weapon, 2nd highest yield of any U.S. weapon (along with similar Mk-24); 3 mods; Mod 2 contact fused; 1x64 ft. parachute; replaced by the Mk-36
MK-18	Bomb	60	128	8,600	500 kT (Ivy King shot)	Airburst or contact	LASL	Manufactured 3/53 - 2/55; Retired 1/56 - 3/56; 90 produced (all mods)	Very high-yield MK-6/Mk-13 follow-on; largest pure fission bomb ever deployed; nicknamed the SOB ("Super Oralloy Bomb"); 92-point implosion system, all HEU core; 2 mods; Retired by conversion to lower yield Mk-6 Mod 6; superseded by TN Mk-15 and Mk-28
W-19	Artillery Shell	11.02 (280 mm)	54	600	15 - 20 kT	Mechanical time delay airburst	LASL	Production began 7/55; Retired 1963; 80 produced	Used in T-315 atomic projectile; improved W-9; gun-assembly HEU weapon
Mk-20	Bomb	60	128	6,400			LASL	Cancelled Aug 1954	Improved high-yield MK-13; superseded by TN MK-15
Mk-21	Bomb	56.2; 58.5	149 - 150	15,000 - 17,700	4 - 5 MT	Airburst, contact, laydown	LASL	Manufactured 12/55 - 7/56; Retired 6/57 - 1//57; 275 produced (all mods)	Redesigned Shrimp TN device with 95% enriched Li-6 fuel; 3 mods, all "dirty"; "clean" version tested, never deployed; Mod 1 contact fused; Mod 2 also had w/boosted primary; Retired by conversion to Mk-36-Y1 Mod 1
W-21	Warhead	52;	145	15,000 - 16,000			LASL	Cancelled	For B-58, SM-64A 56 Navaho
Mk-22	Bomb	51		18,000	1 MT		UCRL	Cancelled April 1954	Based on the Edward Teller designed Morgenstern/Ramrod devices; cancelled following Morgenstern fizzle (Castle Koon)
W-23	Artillery Shell	16	64	1,500; 1,900	15 - 20 kT	Mechanical time delay airburst	LASL	Production began 10/56; Retired 10/62; 50 produced	US Navy "Katie" shell; W-19 (11 inch shell) internal components adapted to 16 inch shell body
EC 24	Bomb	61	225	39,600	13.5 MT (Castle Yankee shot)	Airburst	LASL	Stockpiled 4/54 - 10/54; 10 produced	"Emergency Capability" weapon (deployed prototype); used enriched Li-6; free fall bomb
Mk-24	Bomb	61.4	296	41,400 - 42,000	10 - 15 MT	Airburst	LASL	Manufactured 7/54 - 11/55; Retired 9/56 - 10/56; 105 produced	Similar to MK-17, different secondary; heaviest U.S. nuclear weapon, 2nd highest yield of any U.S. weapon (along with similar Mk-17); 2 mods (Mod 2 with contact burst cancelled); 1x64 ft parachute; replaced by the Mk-36
W-25	Warhead	17.35 - 17.4	25.7 - 26.6	218 - 221	1.7 kT	Time delay	LASL	Manufactured 5/57 - 5/60; Mod 0 retired 8/61 - 1965, all retired by 12/84; 3150 produced (all mods)	MB-1 Genie AAM warhead; unboosted composite implosion warhead; first "sealed pit" weapon; 2 mods, Mod 1 had environmental sensing device safeties
Mk-26	Bomb	56.2	150	15,000 - 17,700			LASL	Cancelled 1956	Mk-21 sibling design
Mk-27	Bomb	30.2	125 - 142	3,150 - 3,300		Airburst or contact	UCRL	Manufactured 11/58 - 6/59; Retired 11/62 - 7/65; 700 (all mods) produced	Navy TN bomb; This UCRL design was a competitor with the LASL Mk-28 to satisfy the Class "D" light weight TN bomb requirement; 3 mods
W-27	Warhead	30.25 - 31	75	2,800	2 MT	Airburst or contact	UCRL	Manufactured 9/58 - 6/59; retired 8/62 - 7/65; 20 produced	Regulus I (SSM-N-8) SSM cruise missile warhead; considered for several other systems all of which were were cancelled: the F-101 and B-58 bomb pods, and the Rascal, Regulus II, and Matador cruise missiles
Mk-28	Bomb	20; 22	96 - 170	1,700 - 2,320	Y1: 1.1 MT, Y2: 350 kT, Y3: 70 kT, Y5: 1.45 MT	FUFO: F/F or retarded, airburst or contact, laydown	LASL	Manufactured 1/58 - 3/58, 8/58 - 5/66; retirement of early mods began 1961, last one retired 9/91; 4500 produced (all mods)	Multipurpose TN tactical and strategic bomb; longest weapon design in U.S. (33 years); 2nd largest production run of any U.S. weapon design; Y4 was fission only; 20 mods and variants; PAL A (Y1), B (Y2), D (Y3, Y5); replaced by B-61 and B-83 bombs; 1-point safety problem with primary discovered after start of initial manufacture, halting production for 5 months
W-28	Warhead	20	60	1,500 - 1,725	70 kT - 1.45 MT	Airburst or contact	LASL	Manufactured 8/58 - 5/66, entered service (Hound Dog) 1959 and (Mace) 1960; Hound Dog retired 1/64 - 1976, Mace retired 1970; production - 900 (Hound Dog), 100 (Mace)	Warhead for the Hound Dog (AGM-28) and Mace (MGM-13) cruise missiles; 5 mods; PAL A and B
W-29	Warhead	52; 35	145	3,500			LASL	Cancelled Aug 1955	Cancelled in favor of Mk-15
W-30	Warhead	22	48	438; 490; 450	300 T; 500 T (Talos and TADM); 4.7 kT; 19 kT	Airburst, contact, time delay	LASL	TADM: stockpiled 1961 - 1966, 300 produced; Talos: manufactured 2/59 - 1/65, retired 1/62 - 3/79; 300 produced	Multipurpose warhead: Talos SAM/SSM, XW-30-X1 TADM (Tactical Atomic Demolition Munition) warhead; Talos - 1 yield, 3 mods; TADM - 2 yields stockpiled
W-31	Warhead	28 - 29; 30	39 - 39.3	900 - 945	1, 2, 12, 20, 40 kT	Airburst, timer, surface	LASL	Honest John: manufactured 10/59 - 12/61, retired 7/67 - 1987, 1650 produced; Nike Hercules: manufactured 10/58 - 12/61, retired 7/67 - 9/89, 2550 produced; ADM: stockpiled 9/60 - 1965, 300 produced	Multipurpose boosted fission warhead: Honest John SSM, Nike Hercules SAM, ADM (Atomic Demolition Munition); Versions used: Honest John: W-31 Mod 0, 3; Nike-Hercules: W-31 Mod 0, 2; ADM: Mk-31 Mod 1; 4 yields stockpiled: 2 for Nike-Hercules, 3 for Honest John (2, 20, and 40 kT)
W-32	Artillery Shell	9.45 (240 mm)		400; 450			LASL	Cancelled May 1955
W-33	Artillery Shell	8 (203 mm)	37	240 - 243	5 - 10 kT, 40 kT (Y2)	Mechanical time delay airburst	LASL	Manufactured 1/57 - 1/65; Retired 9/92; 2000 produced	W-33 used in the T-317 atomic projectile; gun-assembly HEU weapon; used titanium to reduce weight and size; 4 yields (Y1 - Y4) using different internal HEU assemblies, high yield variant may be boosted; 2 mods
W-34	ASW warhead / Bomb	17	32	312; 320; 311	11 kT	Hydrostatic, laydown, impact	LASL	ASW: Manufactured 8/58 - 12/62; retired 7/64 - 1971 (Lulu), 7/64 - 1976 (Astor); 2000 Lulu, 600 Astor produced; Hotpoint: Manufactured 6/58 - 9/62; Retired by 1965; 600 produced	Multipurpose warhead for ASW (antisubmarine warfare) and tactical use; ASW: Mk-34 Lulu depth bomb, Mk-44 Astor torpedo; tactical: Mk-105 Hotpoint bomb, first parachute retarded laydown weapon; 2 mods; boosted fission implosion device identical to the Mk-28 primary
W-35	Warhead	20; 28		1,500 - 1,700	1.75 MT		LASL	Cancelled Aug 1958	Early LASL TN ballistic missile warhead, intended for Atlas, Titan ICBMs, Thor, Jupiter IRBMs; competitor with UCRL W-38; cancelled in favor of W-49 (a modified Mk-28)
Mk-36	Bomb	56.2; 58; 59	150	17,500; 17,700	9 - 10 MT	F/F or retarded airburst or contact	LASL	Manufactured 4/56 - 6/58; Retired 8/61 - 1/62; 940 produced (all mods)	Two-stage TN strategic bomb; Y1 "dirty," Y2 "clean", each in two mods; parachutes 1x5 ft, 1x24 ft ribbon; all Mk-21s converted to Mk-36 in 1957; Retired in favor of Mk-41; at retirement this weapon represented almost half of the megatonnage of the U.S. arsenal
W-37	Warhead	30		900; 940			LASL	Cancelled 9/1956	Intended to be a high-yield multipurpose companion to the W-31; XW-37 was redesignated XW-31Y2
W-38	Warhead	32	82.5	3,080	3.75 MT	Airburst or contact	UCRL/LRL	Manufactured 5/61 - 1/63; retired 1/65 - 5/65; Production: 110 (Atlas), 70 (Titan)	Warhead for Atlas E/F and Titan I ICBMs; used Avco Mk 4 RV; first UCRL/LRL designed TN ballistic missile warhead; competitor with LASL W-35/49
Mk-39	Bomb	35, 44 (tail section)	136 - 140	6,650 - 6,750	3-4 MT (2 yields, Y1 and Y2)	Airburst, contact; mod w/low-level retarded laydown	LASL	Manufactured 2/57 - 3/59; Retired 1/62 to 11/66; 700 produced (all mods)	Improved Mk-15, Mk-39 Mod 0 same as TX-15-X3; used gas-boosted primary to reduce weight; thermal batteries, improved safeties; 3 mods; parachutes: 1x6 ft, 1x28 ribbon, 1x100 ft
W-39	Warhead	34.5 - 35	105.7	6,230 - 6,400	3.8 MT (2 yields, Y1 and Y2)		LASL	Redstone: stockpiled 7/58 - 1963, 60 produced; Snark: manufactured 4/58 - 7/58, retired 8/62 - 9/65, 30 produced	Warhead for Snark cruise missile, Redstone MRBM, B-58 weapon pod; Versions: Redstone Mk-39Y1 Mod 1 and Mk-39Y2 Mod 1, Snark Mk-39Y1 Mod 1; W-39 identical to Mk-39 except for fuzing system
W-40	Warhead	17.9	31.64	350; 385 (Y1)	10 kT (Y1)	Airburst or contact	LASL	Bomarc: manufactured 9/59 - 5/62, retired by 11/72, 350 produced; Lacrosse: manufactured 9/59 - 5/62, retired 10/63 - 1964, 400 produced	Warhead for Bomarc SAM and Lacrosse SSM; boosted implosion system adapted from Mk-28 primary; initially deployed version (produced 6/59-8/59) not 1-point safe, Mod 2 retrofit required; 2 yields
Mk-41	Bomb	52	148	10,500 - 10,670	25 MT	FUFU: F/F or retarded, airburst or contact, laydown	UCRL/LRL	Manufactured 9/60 - 6/62; Retired 11/63 - 7/76; 500 produced	Highest yield U.S. weapon ever deployed; only U.S. 3-stage TN weapon; Y1 "dirty," Y2 "clean"; parachutes 1x4 ft, 1x16.5 ft; retired in favor of Mk-53
W-41	Warhead	50		9,300			UCRL/LRL	Cancelled July 1957
W-42	Warhead	13 - 14	18.5	75 - 92		Proximity	LASL	Cancelled June 1961	Intended for air-to-air (e.g. GAR-8), surface-to-air (e.g. Hawk) applications
Mk-43	Bomb	18	150 - 164	2,060 - 2,125	70 kT - 1 MT; Y1: 1 MT, Y5: 500 kT	F/F or retarded, airburst or contact, laydown	LASL	Manufactured 4/61 - 10/65; retirement (early mods) began 12/72, last retired 4/91; 1000 produced (all mods)	Laydown bomb for high-speed low-altitude delivery; 5 yields; Y4 is fission only; PAL B (mod 2); Parachutes: 1x4 ft, 1x23 ft ribbon; last version retired was MK-43Y2 Mod 2
W-44	ASW warhead	13.75	25.3	170	10 kT	Hydrostatic	LASL	Manufactured 5/61 - 3/68; retired 6/74 - 9/89; 575 produced	ASROC (RUR-5A) ASW warhead; plutonium implosion warhead, similar to primary for Mk-43
W-45	Warhead	11.5	27	150; MADM: 350	500 T; 1, 5, 8, 10, 15 kT	Airburst, surface, time delay, command	UCRL/LRL	Terrier: manufactured 4/62 - 6/66, retired 7/67 - 9/88, 750 produced; MADM: manufactured 1/62 - 6/66, retired 7/67 - 1984, 350 produced; Bullpup: manufactured 1/62 - 1963, retired 7/67 - 1978, 100 produced; Little John: manufactured 9/61 - 6/66, retired 7/67 - 1970, 500 produced	Multipurpose UCRL/LRL designed tactical warhead; small implosion design; Y1 (1 kT): Little John SSM, Terrier SAM, MADM (Medium ADM); Y2: Little John, MADM; Y3 (unboosted): GAM-83B Bullpup ASM, MADM; Y4 (boosted, 1 kT): Bullpup, Little John, Terrier, MADM
Mk-46	Bomb	37		6,400	MT range		LASL	Cancelled Oct 1958	"Clean" and "dirty" versions tested during Hardtack I; was to have replaced Mk-39; development of improved design continued as Mk-53
W-46	Warhead	35-40					LASL	Cancelled April 1958	Warhead planned for Redstone, Snark, B-58 pod warhead; Redstone/W-46 cancelled in favor of Titan II/W-53
W-47	Warhead	18	46.6	Y1: 717 - 720; Y2: 733	Y1: 600 kT; Y2: 1.2 MT	Airburst or contact	LASL	EC-47 manufactured 4/60 - 6/60, retired 6/60, 300 produced; W-47 manufactured 6/60 - 7/64, retired 7/61 - 11/74, 1060 produced (Y1 and Y2) - only 300 in service at a time	Polaris SLBM TN warhead; breakthrough in compact, light high yield design; integral warhead/beryllium re-entry vehicle; 3 versions: EC-47, W-47Y1, W-47Y2; several severe reliability problems required repeated modification and remanufacture (in 1966 75% of the stockpiled Y2s were inoperable, correction took until 10/67)
W-48	Artillery Shell	6.1 (155 mm)	33.3	118 - 128	72 T	Mechanical time delay or proximity airburst, or contact	UCRL/LRL	Manufactured 10/63 - 3/68; retirement (135 Mod 0s) 1/65 - 1969, all 925 Mod 1s retired 1992; 1060 produced (all mods)	Small diameter linear implosion plutonium weapon, 2 mods
W-49	Warhead	20	54.3 - 57.9	1,640 - 1,680	1.44 MT	Airburst or contact	LASL	Manufactured 9/58 - 1964; Thor retired 11/62 - 8/63 (a few to 4/75);	LASL developed ICBM/IRBM warhead; Used in Thor (Mod 0,1, 3), Atlas (Mod 0, 1), Titan, Jupiter (Mod 0, 1, 3, 5) warhead; 2 RVs used Mk-2 heat sink and Mk-3 ablative; 2 yields, 7 mods; Mk/W-28 adaptation with new arming/fuzing system; PAL A; successor to W-35
W-50	Warhead	15.4	44	409 - 410	Y1: 60 kT; Y2: 200 kT; Y3: 400 kT	Airburst or contact	LASL	Manufactured 3/63 - 12/65; retired 4/73 - 4/91; 280 produced	TN warhead for Pershing SSM (Mod 1, 2), Nike Zeus SAM (cancelled 5/59); Mod 1 equipped with PAL A; 3 yields, 2 mods
W-51	Warhead				22 T		LRL	Became XW-54 Jan 1959	Very small spherical implosion warhead, initial development by LRL, development transferred to LASL and design redesignated W-54
W-52	Warhead	24	56.7	950	200 kT	Airburst or contact	LASL	Manufactured 5/62 - 4/66; retired 3/74 - 8/78; 300 produced	Sergeant SSM warhead; 2 yields, 3 mods; PAL A (Mod 2); warhead test in 1963 showed Mods 1 and 2 to be useless, Mod 3 was first to achieve rated yield
Mk/B53	Bomb	50	148 - 150; Y2 144	8,850 - 8,900	9 MT	FUFO: F/F or retarded, airburst or contact, laydown	LASL	Manufactured 8/62 - 6/65; 350 produced; retirement (early mods) began 7/67, last 50 retired from active service (but retained in stockpile) in favor of B-61 Mod 11, early 1997.	Carried by B-47, B-52; B-58 used Mk-53BA (in BLU-2/B pod); 4 mods, Y1 "dirty" version, Y2 "clean" version; fissile material all HEU, no plutonium; parachutes: 1x4 ft, 1x16.5 ft ribbon, 3x48 ft ribbon; last unit dismantled 25 October 2011.
W-53	Warhead	37	103	6,200	9 MT	Airburst or contact	LASL		Titan II warhead
W-54	Warhead	10.75	15.7	50 - 51	250 T	Contact or proximity	LASL	Manufactured 4/61 - 2/65; retired 7/67 - 4/72; 1000 - 2000 produced	GAR-11/AIM-26A Falcon AAM warhead; originally called "Wee Gnat"; adaptation of Mk-54
Mk-54	Warhead	10.75	17.6	50 - 55	10, 20 T	Time delay	LASL	Manufactured 4/61 - 2/65; retired 7/67 - 1971; 400 produced	Warhead for Davy Crockett M-388 recoilless rifle projectile; 2 yields; 2 mods; very light, compact spherical implosion plutonium warhead
Mk-54 SADM	Atomic Demolition Munition (ADM)	16	24	150 (complete); 59 (W-54 only)	Variable, 10 T - 1 kT	Time delay	LASL	Manufactured 8/64 - 6/66; retired 1967 - 1989; 300 produced SADM:	M-129/M-159 SADM (Special Atomic Demolition Munition) used a Mk-54 warhead package very similar to Davy Crockett; 2 mods; mechanical combination lock PAL
W-55	ASW	13	39.4	470	Mid Kiloton Range	Hydrostatic	LASL	Manufactured 1/64 - 3/68, 3/70 - 4/74; retired 6/83 - 9/90; 285 produced	SUBROC (UUM-44A) ASW missile thermonuclear warhead; based on the 202 kT Hardtack I Olive device
W-56	Warhead	17.4	47.3	600; 680	1.2 MT	Airburst or surface	LASL	Manufactured 3/63 - 5/69; retired 9/66 (early mods), Mod-4 retired 1991-93; 1000 produced (all mods), 455 Mod-4s produced	Minuteman I and II warhead, based on UCRL W-47, competitor with the W-59 for Minuteman; 4 mods, retrofit of early mods required to fix reliability problem, blast and radiation hardening added later
Mk-57	Bomb	14.75	118	490 - 510	5 - 20 kT	Retarded airburst, retarded laydown, F/F contact, hydrostatic	LASL	Manufactured 1/63 - 5/67; retirement (early mods) started 6/75, last retired 6/93; 3,100 produced	Light weight multipurpose tactical strike/depth bomb; boosted implosion fission weapon; modular design, 6 mods; PAL B; 1x12.5 ft ribbon parachute; Retired in favor of B-61
W-58	Warhead	15.6	40.3	257	200 kT	Airburst or contact	LASL	Manufactured 3/64 - 6/67; retired 9/68-4/82; 1400 produced	Polaris A-3 warhead, each A-3 carried three multiple re-entry vehicles (MRVs), first MRV warhead in service
W-59	Warhead	16.3	47.8	550 - 553	1 MT	Airburst or contact	LASL	Manufactured 6/62 - 7/63; retired 12/64 - 6/69; 150 produced	Warhead for Minuteman I/Mk 5 RV and the cancelled Skybolt; version of LASL "J-21" design;
W-60	Warhead	13	20	115 - 150	Very low	Proximity	LASL	Cancelled Dec 1963	Typhon SAM warhead
Mk/B-61	Bomb	13.3	141.64	695 - 716	Variable. In service: Mod 3: 0.3, 1.5, 60, 170 kT; Mod 4: 0.3, 1.5, 10, 45 kT; Mod 7/11: 4 yields, 10 - 340 kT; Mod 10: 0.3, 5, 10, 80 kT; Mod 12: 0.3, 1.5, 10, 50 kT	FUFO: retarded and F/F, contact or airburst, laydown	LANL	Manufactured 10/66 - early 90s; early mods retired 70s - 80s; 3150 produced, 1350 in service; Mod 12 production (Mod 4 conversion) began 11/21	Multipurpose tactical/strategic bomb; basic design adapted to many other weapon systems; DAY (Dial-A-Yield); 12 mods, 6 in stockpile, 5 in active service; PAL B (retired), D, F; primary uses IHE; parachute: 1x17 ft or 1x24 ft ribbon; longest production run of any U.S. nuclear weapon, oldest design in service; part of the U.S. Enduring Stockpile.
W-62	Warhead	RV Body: 21 in; Warhead: 19.7 in	RV Body: 72 in; Warhead: 39.3 in	Warhead/RV: 700-800; Warhead: 253	170 kT	Airburst or contact	LRL	Manufactured 3/70 - 6/76; early mods retired starting 4/80; 1725 produced	Minuteman III/Mk-12 RV warhead; remaining W-62s replaced by W-88s in 2010 and dismantled.
W-63	Warhead						LASL	Cancelled Nov 1966	LRL design for Lance SSM warhead; ER ("neutron bomb") design; (cancelled in favor of W-70
W-64	Warhead						LASL	Cancelled Sep 1964	LASL design for Lance SSM warhead; ER ("neutron bomb") design; cancelled in favor of W-63
W-65	Warhead				MT range		LASL	Cancelled Jan 1968	Sprint ABM warhead, cancelled in favor of W-66
W-66	Warhead	18	35	150	kT range		LASL	Manufactured 6/74 - 3/75; retired from service 8/75, ret. from stockpile 1985; 70 produced	Sprint ABM warhead, ER ("neutron bomb") warhead
W-67	Warhead			Warhead/RV: 938; Warhead 675	150 kT		LASL	Cancelled Dec 1967	LASL ICBM/SLBM multiple warhead, intended for Poseidon and Minuteman-III. Mark 17 RV
W-68	Warhead			367	40 - 50 kT	Airburst or contact	LRL	Manufactured 6/70 - 6/75; retired 9/77 - 1991; 5250 produced	Poseidon Mk-3 RV warhead, each missile carried 10 RVs; aging problems with explosive required complete rebuilding of stockpile 11/78-83 (3200 rebuilt, others retired); largest production run of any U.S. warhead
W-69	Warhead	15	30	275	170 - 200 kT	Airburst or contact	LASL	Manufactured 10/71 - 8/76; retired 10/91 - 9/94; 1500 produced	SRAM (short range attack missile, AGM 69A) air-surface missile warhead; derived from Mk-61; initially removed from service 6/90 due to fire safety concerns
W-70	Warhead	18	41	270	Mods 0,1, 2: variable from 1-100 kT; Mod 3: 1 kT	Airburst or contact	LRL	Manufactured 6/73 - 7/77 (Mods 0-2), 8/81 - 2/83 (Mod 3); retired 7/79 - 9/92; Mods 0-2: 900 produced, Mod 3: 380 built	Lance SSM warhead; LRL successor to W-63 design; 4 mods; Mods 0, 1, 2: TN warhead with 3 yield settings (1-100 kT), Mod 1 had improved selection of yields; Mod 3: enhanced radiation ("neutron bomb") version, 2 yield options (slightly less than 1 kT, and slightly more than 1 kT), both 60% fusion and 40% fission; PAL D
W-71	Warhead	42	101	2,850	5 MT	Airburst (command & delay timer)	LRL	Manufactured 7/74 - 7/75; retired from service 1975, ret. from stockpile 9/92; 30 produced	Spartan ABM warhead, used thermal x-rays for exoatmospheric RV kill
W-72	Warhead	15	79	825	ca. 600 T	Contact	LASL	Manufactured 8/70 - 4/72; retired 7/79 - 9/79; 300 produced	Walleye (AGM-62) guided glide bomb warhead; W-72 was a modified W-54, salvaged from retired AIM-26A Falcon AAM; yield was significantly enhanced over Falcon version
W-73	Warhead	<17					LASL	Cancelled 9/1970	Condor ASM warhead; derived from Mk-61; cancelled in favor of a conventional HE warhead
W-74	Artillery Shell	6.1 (155 mm)			2 yields (both >100 T)		LASL	Cancelled June 1973	Linear implosion pure fission plutonium warhead; intended to replace W-48
W-75	Artillery Shell	8 (203 mm)			100 T		LRL	Cancelled 1973	"Big brother" of W-74, similar design
W-76	Warhead			363	100 kT (Mod 0), 90 kT (Mod 1), 5-7 kT (Mod 2)	Airburst or contact	LASL/ LANL	Manufactured 6/78 - 7/87; W76-1 LEP 9/08-12/18; W76-2 1/19-2024 active service; approx. 3000 produced, 2000 modified to Mod 1, ~25 Mod 2	Trident I and Trident II Mk-4 RV (Mod 0), Mk-4A (Mods 1 and 2), missiles can carry up to 14 RVs; oldest missile warhead in service; part of the U.S. Enduring Stockpile.
B-77	Bomb	18	144	2,400	Variable, kT to MT range	FUFO	LASL	Cancelled Dec 1977	High yield strategic TN bomb, intended to replace Mk-28 and Mk-43; PAL D; costly, heavy delivery system lead to cancellation, warhead design continued with B-83
W-78	Warhead	21.25	67.7	400 - 600	335 - 350 kT	Airburst or contact	LASL/ LANL	Manufactured 8/79 - 10/82; active service; 1083 produced, ~600 active service	Minuteman III/Mk-12A RV warhead; design derived from W-50 with a new lighter primary; part of U.S. Enduring Stockpile. To be retired for W87 Mod-1 when Minuteman replacement is deployed ~2030.
W-79	Artillery Shell	8	44	200	Variable - 100 T to 1.1 kT (Mod 0), 0.8 kT (Mod 1)	Proximity airburst or contact	LLNL	Manufactured 7/81 - 8/86; ER version retirement started mid-80s, all retired 9/92; 550 (325 ER, 225 fission) produced	Plutonium linear implosion weapon, used in XM-753 atomic projectile (AFAP); Mod 0: dual capable - pure fission or enhanced radiation (ER of "neutron bomb"), 3 yield options; Mod 1: fission only; PAL D
W-80-0	Warhead	11.8	31.4	290	Variable: 5 kT and 170-200 kT	Airburst or contact	LANL	Manufactured 12/83 - 9/90; active service; 367 produced	SLCM warhead; uses supergrade plutonium; PAL D; derived from Mk/B-61 warhead; now stored ashore; part of the U.S. Enduring Stockpile
W-80-1	Warhead	11.8	31.4	290	Variable: 5 kT and 150-170 kT	Airburst or contact	LANL	Manufactured 1/81 - 9/90; active service; 1750 produced, 1400 in service	Warhead for ALCM (1000 in service), ACM (400 in service); PAL D; derived from Mk/B-61 warhead; part of the U.S. Enduring Stockpile
W-81	Warhead	<13.5			2 - 4 kT		LANL	Cancelled 1986	USN Standard SM-2 SAM warhead; PAL F; variant of Mk/B-61 warhead, enhanced radiation version initially planned, later converted to fission only
W-82	Artillery Shell	6.1 (155 mm)	34	95	<2 kT	Airburst	LANL	W-82-0 cancelled in Oct 1983; W-82-1 cancelled in 9/1990	155 mm companion to the the W-79, for use in XM-785 atomic projectile (AFAP); original Mod 0: dual capable - pure fission or enhanced radiation; Mod 1: fission only; PAL D
B-83	Bomb	18	145	2,400	Variable, low kT to 1.2 MT	FUFO: F/F or retarded, airburst or contact, laydown	LLNL	Manufactured 6/83 - 1991; active service; 650 produced	Current high-yield strategic TN bomb; PAL D; uses IHE, fire resisitant pit; parachutes: 3x4 ft, 1x46 ft; 1x5 ft, 1x46 ft. To be retired under the 2022 Nuclear Policy Review.
W-83	Warhead			1,700 - 1,900			LLNL		PAL D
W-84	Warhead	13	34	388	Variable: 0.2 - 150 kT	Airburst or contact	LLNL	Manufactured 9/83 - 1/88; inactive stockpile; 300-350 produced	GLCM warhead, missile scrapped under INF Treaty; LLNL design derived from LANL Mk/B-61 Mod 3/4 warhead; safety features: IHE, PAL G; FRP, ENDS, Command Disable. Part of the U.S. Enduring Stockpile as inactive reserve weapons
W-85; alternate image	Warhead	12.5	42	880	Variable: 5 - 80 kT	Airburst or contact	LANL	Manufactured 2/83 - 7/86; retired 1988 - 3/91; 120 produced	Pershing II SSM warhead; derived from LANL Mk/B-61 Mod 3/4 warhead; uses IHE, PAL F; upon retirement the W-85 was recycled into B-61 Mod 10 bombs
W-86	Warhead					Delayed	LASL	Cancelled 9/1980	Earth penetrating warhead for the Pershing II SSM, cancelled due to change in mission from hard to soft targets
W-87-0	Warhead	21.8	68.9	500 - 600; 440	300 kT	Timer or proximity airburst, contact	LLNL	Manufactured 7/86 - 12/88; active service; 525 produced	Initially deployed on Peacekeeper ICBM/Mk-21 RV (carried 10), now deployed on Minuteman III (with W-78); RV/warhead weighs 800 lb; primary uses IHE and fire resistant pit; part of the U.S. Enduring Stockpile.
W-87-1	Warhead	21.8	68.9	500 - 600; 440	475 kT	Timer or proximity airburst, contact	LLNL	Manufacture to start ~2030 Phase 6.3 development None produced	Phase 6.4 Production Engineering planned for mid 2026, Phase 6.5 Initial Production planned for 2030. Will replace W78 when Minuteman III is retired (~2030).
W-88	Warhead	21.8	68.9	<800	475 kT	Timer (w/path length correction) and proximity airburst; contact	LANL	Manufactured 9/88 - 11/89; active service; ~400 produced	Trident II Mk-5 RV warhead; does not use IHE; uses HEU jacket with secondary stage; production terminated by FBI raid on Rocky Flats; part of the U.S. Enduring Stockpile
W-89	Warhead	13.3	40.8	324	200 kT	Airburst or contact	LANL	Cancelled 9/1991	SRAM (short range attack missile) II warhead; LLNL design; safety features: PAL D, IHE, FRP; also considered for Sea Lance ASW missile
B 90	Bomb	13.3	118	780	200 kT	retarded airburst, retarded contact, F/F airburst, F/F contact, hydrostatic	LANL	Cancelled 1991	USN nuclear strike/depth bomb; intended to replace Mk-57; PAL D; 1x26 ft parachute
W-91	Warhead			310	10, 100 kT		LANL	Cancelled 9/1991	SRAM-T (short range attack missile - tactical) warhead; SRAM-T was a SRAM II derivative for the F-15E Eagle fighter/bomber; design orignally called "New Mexico 1"; safety features: FRP, IHE; 2 yields
W-92	Warhead						LANL	Cancelled 1990	Sealance (proposed). Never entered Phase 3 (Development Engineering).
RNEP	Bomb				Sub-kT to MT			Study start 4/2002; FY2005/FY2006 funding denied, no further request.	Robust Nuclear Earth Penetrator (proposed). Modifications of B-83 and B-61 bombs considered. Never entered Phase 2A (Design Definition and Cost Study). No formal military requirement prepared.
RRW-1	Warhead							Cancelled	RRW-1 Reliable Replacement Warhead-SLBM (proposed). Never entered Phase 2A (Design Definition and Cost Study).
RRW-2	Bomb							Cancelled	RRW-2 Reliable Replacement Warhead-Bomb (proposed). Never entered Phase 2A (Design Definition and Cost Study).
W-93	Warhead	Unknown	Unknown	Unknown	Unknown	Similar or the same as for the W-88	LANL	Phase 2A design start 2/2020. Projected availability 2030.	SLBM warhead; based on currently tested designs and components already in the stockpile, but enhanced safety.

TX-1 / T-1 footnote. This weapon appears in no published nuclear weapons history or compilation to date (3/2023) because it was developed outside of the U.S. nuclear weapons laboratory system by the U.S. Army and no nuclear history researchers have ever filed FOIA requests about it with Picatinny Arsenal where the design was developed. The information about this weapon was provided to me by Dr. Peter D. Zimmerman. There is a display of this weapon in the classified Nuclear Weapons Instructional Museum (NWIM) at Kirtland Air Force Base, New Mexico.

Abbreviations:

AAM Air-to-Air Missile
ABM Anti-Ballistic Missile
ACM Advanced Cruise Missile
ADM Atomic Demolition Munition
AFAP Artillery Fired Atomic Projectile
ALCM Air Launched Cruise Missile
ASM Air-Surface Missile
ASW Anti-Submarine Warfare
ER Enhanced Radiation ("neutron bomb")
EC Emergency Capability
ENDS Enhanced Nuclear Detonation Safely
F/F Freefall
FRP Fire Resistant Pit
FUFO Full-fuzing Options
HEU Highly Enriched Uranium
ICBM Intercontinental Ballistic Missile
IFI In-Flight Insertion
IHE Insensitive High Explosive
IRBM Intermediate-Range Ballistic Missile
kT Kilotons
LANL Los Alamos National Laboratory (1981-present)
LASL Los Alamos Scientific Laboratory (1 January 1947-1981)
LEP Life Extension Program
LLL Lawrence Livermore Laboratory (1971-renamed LLNL 1981)
LLNL Lawrence Livermore National Laboratory (1981-present)
LRL Lawrence Radiation Laboratory (1958-1971, renamed LLL)
MK Mark
MRBM Medium-Range Ballistic Missile
MT megatons
PAL Permissive Action Link
Pu Plutonium
RV Re-entry Vehicle
SAM Surface-to-Air Missile
Rtd Parachute-retarded
SLBM Sea-Launched Cruise Missile
SSM Surface-to-Surface Missile
T tons
TN Thermonuclear
UCRL University of California Radiation Laboratory (1952-1958, renamed LRL)
USN US Navy

Principal Sources:
Nuclear Matters Handbook 2020; Office of the Deputy Assistant Secretary of Defense for Nuclear Matters (ODASD(NM)).
Historic and Projected United States Nuclear Weapon Program Entrance and Exit Dates by Engineering Phase. SAND2017-2818C
Nuclear Matters Handbook 2016; Office of the Deputy Assistant Secretary of Defense for Nuclear Matters (ODASD(NM)).
Swords of Armageddon, Version 2; Chuck Hansen, 2007
“Bunker Busters”: Robust Nuclear Earth Penetrator Issues, FY2005-FY2007; Congressional Research Service, RL32347, Updated February 21, 2006.
Swords of Armageddon, Chuck Hansen, 1995
U.S. Nuclear Weapons: The Secret History; Chuck Hansen, 1988
Nuclear Weapons Databook: U.S. Nuclear Forces and Capabilities; Thomas B. Cochran, William M. Arkin, and Milton M. Hoenig, 1984
NRDC Nuclear Notebook prepared by Robert S. Norris and William Arkin of the Natural Resources Defense Council, published in The Bulletin of the Atomic Scientists.
Especially in issues:

July/August 1996
July/August 1995