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 5990-01-425-2175
NSN 6130-01-659-4700
NSN 6650-01-449-5446
NSN 5905-00-683-6491
NSN 4140-00-465-7668
NSN 6110-00-397-7531
NSN 5855-00-629-5343
NSN 6650-01-422-3395
NSN 5835-01-242-9806
NSN 2925-01-333-6346
NSN 6135-00-958-7981
NSN 5945-01-442-6490