A relatively thin metallic item, having a concave or cupped contour, designed to effect its own seal by compression against the circumference of a hole. It is used as a blowout plug in boilers, engines, and the like to relieve the pressure created by the expansion of fluids caused by heat or freezing.
Classification: Parts for steam or other vapor generating boilers and super-heated water boilers, except heat exchangers
NSN 6685-01-472-0563
NSN 5990-00-985-1334
NSN 6650-01-337-5309
NSN 4140-01-328-1065
NSN 5910-01-310-4587
NSN 6320-00-405-2348
NSN 5920-00-308-0778
NSN 5935-00-395-8186
NSN 7035-01-048-7122
NSN 6240-00-954-7853
NSN 5925-01-225-9966
NSN 6130-01-195-1731