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 6150-00-127-0041
NSN 5920-01-142-1836
NSN 7035-00-020-2227
NSN 6620-01-363-8362
NSN 6110-01-242-9765
NSN 6135-01-193-8154
NSN 5925-01-549-7714
NSN 6150-00-917-6749
NSN 5965-00-810-2204
NSN 5920-01-124-7200
NSN 5920-00-676-9113
NSN 5905-01-386-7284