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 5930-01-475-2283
NSN 5925-01-228-6837
NSN 4140-01-073-7436
NSN 6685-01-101-0261
NSN 5910-01-147-5188
NSN 6135-01-468-6491
NSN 5950-00-378-9959
NSN 5905-01-623-0240
NSN 6685-00-658-3022
NSN 5910-00-947-1243
NSN 5999-01-377-5844
NSN 5835-01-016-4745