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 6650-01-024-9554
NSN 6685-01-227-3137
NSN 5960-00-932-3067
NSN 6130-01-090-0631
NSN 5999-00-960-8232
NSN 5930-01-319-5298
NSN 6240-00-081-6889
NSN 5960-01-023-8800
NSN 5999-00-839-9004
NSN 6650-01-017-6716
NSN 6320-01-113-7647
NSN 6685-00-499-9233