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 5996-01-400-0917
NSN 6240-00-483-1338
NSN 6130-01-113-6715
NSN 5895-01-634-0630
NSN 5999-00-015-8129
NSN 5895-00-760-0845
NSN 6240-00-454-9293
NSN 5996-00-196-7258
NSN 6240-01-063-7685
NSN 5990-00-636-4218
NSN 6130-01-112-2262
NSN 6130-00-954-6479