mark12

The Mark-12 nuclear bomb was a lightweight nuclear bomb designed and manufactured by the United States which was built starting in 1954 and which saw service from then until 1962.
The Mark-12 was notable for being significantly smaller in both size and weight compared to prior implosion-type nuclear weapons. For example, the overall diameter was only 22 inches (56 cm), compared to the immediately prior Mark-7 which had a 30 inches (76 cm) diameter, and the volume of the implosion assembly was only 40% the size of the Mark-7's.
There was a planned W-12 warhead variant which would have been used with the RIM-8 Talos missile, but it was cancelled prior to introduction into service.

View More On Wikipedia.org