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 5835-00-092-1136
NSN 5905-01-593-0017
NSN 5855-01-504-4750
NSN 5950-00-501-1705
NSN 5910-00-186-9470
NSN 5998-01-180-5198
NSN 6650-01-024-9554
NSN 5990-01-527-4868
NSN 2925-00-351-1015
NSN 6685-01-265-3754
NSN 6130-00-337-8054
NSN 5998-00-279-5813