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Kinglet (nuclear primary) - Wikipedia

Kinglet was a boosted fission primary used in several American thermonuclear weapons. The W55 warhead for the UUM-44 SUBROC anti-submarine missile and the W58 warhead for Polaris A-3 were designed to use Kinglet, while the W47 warhead for Polaris A-1/A-2 were retrofitted with Kinglet to overcome the technical issues with the Robin primary the W47 was initially deployed with. Allegedly, only the W47Y2 was converted to the Mod 3 design using Kinglet. The Kinglet device was approximately 11.2–11.57 inches (284–294 mm) in diameter, 11.5–12.2 inches (290–310 mm) in length and weighed approximately 58–63 pounds (26–29 kg). The device was of the two-point design. //  Дальше — en.m.wikipedia.org

W62 - Wikipedia

The W62 was an American thermonuclear warhead designed in the 1960s and manufactured from March 1970 to June 1976. Used on some Minuteman III ICBMs, it was partially replaced by the W78 starting in December 1979, and fully replaced by W87 warheads removed from MX Peacekeeper missiles and retired in 2010. The concept of the W62 began in 1961 with an air force study into reentry vehicles for "multiple mode", what Multiple Reentry Vehicles (MRV) was then called. The study proposed a Mark 12 RV for Minuteman, a Mark 13 RV for Titan II and a Mark 14 RV for Titan I and Atlas. //  Дальше — en.m.wikipedia.org