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 5999-01-198-0632
NSN 6685-00-248-7716
NSN 5999-01-293-4921
NSN 6685-01-488-6932
NSN 5935-00-997-5362
NSN 6130-00-209-6716
NSN 5985-01-464-3153
NSN 5960-01-024-3729
NSN 5935-01-350-4128
NSN 5950-01-268-6345
NSN 5990-00-518-0684
NSN 6685-01-371-2956