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 5935-01-020-7578
NSN 5930-01-649-8225
NSN 6145-01-604-6033
NSN 6620-00-246-5159
NSN 5930-01-434-1522
NSN 6610-00-589-6816
NSN 5930-00-245-8223
NSN 5999-01-459-7565
NSN 6650-00-004-3683
NSN 5905-01-199-7561
NSN 5999-00-769-7407
NSN 6685-01-395-9153