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Declassified British documents indicate that the W47 contained 2.5 kilograms (5.5 lb) of plutonium, 60 kilograms (130 lb) of uranium, 36 kilograms (79 lb) of lithium deuteride and 4 grams (0.14 oz) of tritium.
W47 - Wikipedia
The W47 was an American thermonuclear warhead used on the Polaris A-1 sub-launched ballistic missile system. Various models were in service from 1960 through the end of 1974. The warhead was developed by the Lawrence Radiation Laboratory between 1957 and 1960. The W47 was 18 in (460 mm) in diameter and 47 in (1,200 mm) long, and weighed 720 lb (330 kg) in the Y1 model and 733 lb (332 kg) in the Y2 model. The Y1 model had design yield of 600 kilotons and the Y2 model had a doubled design yield of 1.2 megatons. // Дальше — en.m.wikipedia.org