W58 nuclear warhead | |
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![]() Diagram of the Mark 2 Reentry Body that housed the W58 thermonuclear warhead | |
Type | Nuclear weapon |
Place of origin | United States |
Production history | |
Designer | Lawrence Livermore National Laboratory |
Designed | 1960 to 1964 |
Produced | March 1964 to June 1967[1] |
No. built | 1400[1] |
Variants | 2 |
Specifications | |
Mass | 257 lb (117 kg)[1] |
Length | 40.3 inches (102 cm)[1] |
Diameter | 15.6 in (40 cm)[1] |
Blast yield | 200 kilotonnes of TNT (840 TJ)[1] |
The W58 was an American thermonuclear warhead used on the Polaris A-3 submarine-launched ballistic missile. Three W58 warheads were fitted as multiple warheads on each Polaris A-3 missile.[2]
The W58 was 15.6 inches (400 mm) in diameter and 40.3 inches (1,020 mm) long, and weighed 257 pounds (117 kg). The yield was 200 kilotonnes of TNT (840 TJ).[1] The warhead used the Kinglet primary, which it shared with the W55 and W47 warheads.[3]
The W58 design entered service in 1964 and the last models were retired in 1982 with the last Polaris missiles.[1]
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