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 6650-00-901-4914
NSN 5930-01-628-7297
NSN 5920-00-252-1978
NSN 7035-00-533-4464
NSN 6110-01-303-0839
NSN 5920-00-242-2758
NSN 5855-01-487-5048
NSN 5935-00-087-8049
NSN 5920-01-350-1256
NSN 7035-01-555-9415
NSN 6145-01-406-5022
NSN 5935-01-388-5754