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 5996-01-397-0651
NSN 6620-01-483-1138
NSN 6645-01-596-6077
NSN 5920-00-165-0390
NSN 6150-00-033-2996
NSN 5990-01-024-9659
NSN 6135-01-096-1452
NSN 7035-00-679-9027
NSN 6645-01-573-7603
NSN 6240-00-820-1705
NSN 5935-01-006-6211
NSN 2925-00-149-0760