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 6130-01-227-5538
NSN 6150-00-733-8607
NSN 6130-00-827-1967
NSN 5999-01-379-4107
NSN 5895-00-477-1446
NSN 6620-00-155-2608
NSN 5999-00-081-8621
NSN 6685-01-615-8989
NSN 5930-01-261-9129
NSN 5915-00-470-0586
NSN 5998-01-005-2965
NSN 6620-00-241-5264