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 5999-01-557-7482
NSN 6145-00-132-4800
NSN 7035-00-079-7189
NSN 5935-00-001-8141
NSN 6150-01-628-9758
NSN 4140-01-426-8428
NSN 5920-01-053-0987
NSN 6105-01-415-4135
NSN 6135-00-603-4859
NSN 6150-01-216-1117
NSN 5965-01-525-6322
NSN 5990-00-400-4794