W30

The W30 was an American nuclear warhead used on the RIM-8 Talos surface to air missile and the Tactical Atomic Demolition Munition (TADM).The W30 was 22 inches in diameter and 48 inches long, weighing 438, 450, or 490 pounds depending on the version.The Talos missile variants were produced from 1959 to 1965, and used until 1979. A total of 300 were produced as missile warheads. The W30 Mod 1, 2, and 3 for Talos all had yields of 5 (sometimes more precisely reported as 4.7) kilotons.
See more at Wikipedia.org...

Contact with agricultural machinery