The W62 is an American thermonuclear warhead designed in the late 1960s and manufactured from 1970 to 1976, used on some Minuteman III ICBMs and retired in 2010. The exact dimensions of the W62 are classified, but it fits within the Mark-12 reentry vehicle which is 22 inches in diameter and 72 inches long. The weight of a fully loaded Mark-12 is 800 pounds; the weight of the W62 is stated as 253 lb. The yield of the W62 is 170 kilotons TNT, which is considerably less than earlier W56's 1.2 megatons.