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 6650-01-431-8933
NSN 5915-00-087-6469
NSN 5990-00-450-9872
NSN 5910-01-502-5860
NSN 5835-01-502-9228
NSN 4140-01-542-4857
NSN 6620-00-078-4470
NSN 5935-01-601-8182
NSN 5920-01-566-0470
NSN 5975-01-127-0457
NSN 5990-01-602-6701
NSN 6650-01-434-0331