W86
The W86 was an American earth-penetrating nuclear warhead, intended for use on the Pershing II intermediate-range ballistic missile. The W86 design was canceled in September 1980 when the Pershing II missile mission shifted from destroying... Wikipedia
Blast yield: Publicly estimated to be 5 or 10 kilotonnes of TNT (21 or 42 TJ)
Diameter: 170 mm (6.7 in)