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 6620-00-592-2150
NSN 5915-01-199-4481
NSN 5975-01-462-7829
NSN 5975-01-627-8669
NSN 6220-01-470-4166
NSN 5935-01-306-2367
NSN 6150-01-466-0163
NSN 5935-01-521-2324
NSN 6645-01-311-9794
NSN 5998-01-344-7424
NSN 5998-00-578-8582
NSN 6650-00-929-3946