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 5925-01-495-9952
NSN 5925-00-055-6046
NSN 5999-00-125-9448
NSN 5960-00-450-5524
NSN 5905-01-450-4091
NSN 5905-01-597-2947
NSN 6130-01-530-2202
NSN 7035-00-104-7613
NSN 4140-01-369-8734
NSN 6135-00-170-8819
NSN 6105-00-710-4522
NSN 5905-01-572-6915