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 6650-00-119-9431
NSN 5930-01-460-7971
NSN 6685-00-420-2781
NSN 4140-01-602-9995
NSN 5930-01-107-6117
NSN 5920-01-416-4274
NSN 5960-01-632-6576
NSN 6135-01-110-9470
NSN 5855-00-782-7714
NSN 2925-00-211-4469
NSN 6110-00-719-7209
NSN 2925-01-589-4880