Complete List of All U.S. Nuclear Weapons

Last changed 14 October 2006

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Desig- nation	Type	Width (in.)	Length (in.)	Weight (lb.)	Yield(s)	Fuzing	Deployment Status	Comments
Mk-I	Bomb	28	120	8,900	15 - 16 Kt	Airburst	Used in combat in 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						Theoretical design, never produced	Low-efficiency plutonium implosion bomb
Mk-III	Bomb	60.25	128	10,300	18, 20-23, 37, 49 Kt	Airburst	Used in combat in 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	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	About 150	Low kiloton	Time delay	Entered service, withdrawn, late 1940s	Developed at Picatinny Arsenal for the U.S. Army.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.
W-4	Warhead	60	90	6,500		Airburst	Canceled 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	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	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 canceled; 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	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	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	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: canceled 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	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						Canceled 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	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	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	Canceled 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	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	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	Canceled 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	Canceled 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	Canceled Sept 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	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	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			Canceled Feb 1957	Class "C" TN missile warhead derived from MK-15, canceled in favor of very closely related W-39
TX-16	Bomb	61.4	296.7	39,000 - 42,000	6 - 8 Mt	Airburst	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	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)	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	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	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			Canceled 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	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			Canceled	For B-58, SM-64A 56 Navaho
Mk-22	Bomb	51		18,000	1 Mt		Canceled April 1954	UCRL design based on the Morgenstern/Ramrod devices; canceled following Morgenstern fizzle (Castle Koon)
W-23	Artillery Shell	16	64	1,500; 1,900	15 - 20 Kt	Mechanical time delay airburst	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	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	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 canceled); 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	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			Canceled 1956	Mk-21 sibling design
Mk-27	Bomb	30.2	125 - 142	3,150 - 3,300		Airburst or contact	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	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 canceled: 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	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	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			Canceled Aug 1955	Canceled 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	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	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			Canceled May 1955
W-33	Artillery Shell	8 (203 mm)	37	240 - 243	5 - 10 Kt, 40 Kt (Y2)	Mechanical time delay airburst	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	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		Canceled Aug 1958	Early LASL TN ballistic missile warhead, intended for Atlas, Titan ICBMs, Thor, Jupiter IRBMs; competitor with UCRL W-38; canceled 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	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			Canceled Sept 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	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 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	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)		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	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	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			Canceled July 1957
W-42	Warhead	13 - 14	18.5	75 - 92		Proximity	Canceled 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	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	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	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 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		Canceled 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					Canceled April 1958	Warhead planned for Redstone, Snark, B-58 pod warhead; Redstone/W-46 canceled 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	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	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	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	Manufactured 3/63 - 12/65; retired 4/73 - 4/91; 280 produced	TN warhead for Pershing SSM (Mod 1, 2), Nike Zeus SAM (canceled 5/59); Mod 1 equipped with PAL A; 3 yields, 2 mods
W-51	Warhead				22 T		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	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-53	Bomb	50	148 - 150; Y2 144	8,850 - 8,900	9 Mt	FUFO: F/F or retarded, airburst or contact, laydown	Manufactured 8/62 - 6/65; retirement (early mods) began 7/67, last 50 retired from active service (but retained in permanent stockpile) early 1997; 350 produced, 50 still in stockpile	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 50 retired in favor of B-61 Mod 11; part of the U.S. "enduring stockpile"
W-53	Warhead	37	103	6,200	9 Mt	Airburst or contact		Titan II warhead
W-54	Warhead	10.75	15.7	50 - 51	250 T	Contact or proximity	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	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	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	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	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	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	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	Manufactured 6/62 - 7/63; retired 12/64 - 6/69; 150 produced	Warhead for Minuteman I/Mk 5 RV and the canceled Skybolt; version of LASL "J-21" design;
W-60	Warhead	13	20	115 - 150	Very low	Proximity	Canceled Dec 1963	Typhon SAM warhead
MK/B 61	Bomb	13.3	141.64	695 - 716	Variable (4 yields), 0.3 - 340 Kt; Mod 3: 0.3 - 170 Kt; Mod 4: 0.3 - 45 Kt; Mod 7/11: 10 - 340 Kt; Mod 10: 0.3 - 80 Kt	FUFO: retarded and F/F, contact or airburst, laydown	Manufactured 10/66 - early 90s; early mods retired 70s - 80s; 3150 produced, 1350 in service	Multipurpose tactical/strategic bomb; basic design adapted to many other weapon systems; 4 yields; 11 mods, 5 in service; PAL B, D, F; uses IHE in primary; 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 lb; Warhead: 253 lb	170 Kt	Airburst or contact	Manufactured 3/70 - 6/76; early mods retired starting 4/80; 1725 produced, 610 in active service;	Minuteman III/Mk-12 RV warhead; remaining W-62s part of U.S. "enduring stockpile", but will be removed from active service under START II (to be replaced by W-88s)
W-63	Warhead						Canceled Nov 1966	LRL design for Lance SSM warhead; ER ("neutron bomb") design; (canceled in favor of W-70
W-64	Warhead						Canceled Sep 1964	LASL design for Lance SSM warhead; ER ("neutron bomb") design; canceled in favor of W-63
W-65	Warhead				Mt range		Canceled Jan 1968	Sprint ABM warhead, canceled in favor of W-66
W-66	Warhead	18	35	150	Kt range		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				150 Kt		Canceled Dec 1967	LRL ICBM/SLBM multiple warhead, intended for Poseidon and Minuteman-III
W-68	Warhead			367	40 - 50 Kt	Airburst or contact	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	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 active 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	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)	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	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						Canceled Sept 1970	Condor ASM warhead; derived from Mk-61; canceled in favor of a conventional HE warhead
W-74	Artillery Shell	6.1 (155 mm)			2 yields (both >100 T)		Canceled June 1973	Linear implosion pure fission plutonium warhead; intended to replace W-48
W-75	Artillery Shell	8 (203 mm)			>100 T		Canceled 1973	"Big brother" of W-74, similar design
W-76	Warhead			363	100 Kt	Airburst or contact	Manufactured 6/78 - 7/87; active service; approx. 3000 produced	Trident I and Trident II Mk-4 RV TN warhead, missiles can carry 8-14 RVs; developed by LANL; part of the U.S. "enduring stockpile"
B-77	Bomb	18	144	2,400	Variable, Kt to Mt range	FUFO	Canceled 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	Manufactured 8/79 - 10/82; active service; 1083 produced, 920 in service	Minuteman III/Mk-12A RV warhead; LANL design derived from W-50 with a new lighter primary; part of U.S. "enduring stockpile", but will be removed from active service under START II (to be replaced by W-88s)
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	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	Manufactured 12/83 - 9/90; active service; 367 produced	SLCM warhead; uses supergrade plutonium; PAL D; LANL design 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	Manufactured 1/81 - 9/90; active service; 1750 produced, 1400 in service	Warhead for ALCM (1000 in service), ACM (400 in service); PAL D; LANL design derived from Mk/B-61 warhead; part of the U.S. "enduring stockpile"
W-81	Warhead				2 - 4 Kt		Canceled 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		Airburst	W-82-0 canceled in Oct 1983; W-82-1 canceled in Sept 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	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
W-83	Warhead			1,700 - 1,900				PAL D
W-84	Warhead	13	34	388	Variable: 0.2 - 150 Kt	Airburst or contact	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; uses IHE, PAL F; part of the U.S. "enduring stockpile"
W-85; alternate image	Warhead	12.5	42	880	Variable: 5 - 80 Kt	Airburst or contact	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	Canceled Sept 1980	Earth penetrating warhead for the Pershing II SSM, canceled due to change in mission from hard to soft targets
W-87	Warhead	21.8	68.9	500 - 600; 440	300 Kt; upgradeable to 475 Kt	Timer or proximity airburst, contact	Manufactured 7/86 - 12/88; active service; 525 produced	Peacekeeper (MX) ICBM/Mk-21 RV TN warhead (missile carries 10); RV/warhead weighs 800 lb; LLNL design; primary uses IHE and fire resistant pit; yield upgradeable by adding HEU rings to secondary; part of the U.S. "enduring stockpile"; after MX retirement, will equip Minuteman III
W-88	Warhead	21.8	68.9		475 Kt	Timer (w/path length correction) and proximity airburst; contact	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	Canceled Sept 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	Canceled 1991	USN nuclear strike/depth bomb; intended to replace Mk-57; PAL D; 1x26 ft parachute
W-91	Warhead			310	10, 100 Kt		Canceled Sept 1991	SRAM-T (short range attack missile - tactical) warhead; SRAM-T was a SRAM II derivative for the F-15E Eagle fighter/bomber; LASL TN design orignally called "New Mexico 1"; safety features: FRP, IHE; 2 yields

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

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 (nee LASL)

LASL Los Alamos Scientific Laboratory

LLNL Lawrence Livermore National Laboratory (nee LRL)

LRL Lawrence Radiation Laboratory (nee UCRL)

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

USN US Navy

Principal Sources:
Swords of Armageddon by Chuck Hansen, 1995
U.S. Nuclear Weapons: The Secret History by Chuck Hansen, 1988
Nuclear Weapons Databook: U.S. Nuclear Forces and Capabilities by 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.
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