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 6320-00-116-3658
NSN 7035-01-215-7764
NSN 5935-00-495-6518
NSN 5985-01-214-0960
NSN 5960-00-246-4623
NSN 5895-01-370-7713
NSN 2925-01-294-0585
NSN 5985-01-500-0880
NSN 5905-01-563-3466
NSN 5835-00-262-6146
NSN 5990-00-876-7893
NSN 5990-00-187-5249