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 6645-00-503-1379
NSN 5905-01-090-0447
NSN 5935-01-080-4510
NSN 5915-01-244-9394
NSN 6685-01-025-7018
NSN 5935-00-533-5780
NSN 6650-01-624-0818
NSN 4140-00-196-7139
NSN 6135-01-374-6631
NSN 5975-01-522-7403
NSN 6240-01-601-6427
NSN 5895-01-526-1441