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 5945-00-926-6295
NSN 5965-01-062-8730
NSN 6610-01-200-6861
NSN 7035-01-125-5923
NSN 6610-00-957-3875
NSN 6320-01-006-6138
NSN 5990-01-487-0871
NSN 6150-01-175-2086
NSN 5990-00-357-8103
NSN 5935-01-038-2617
NSN 5975-00-938-3542
NSN 5990-01-215-5997