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 6130-00-690-2273
NSN 5960-01-575-7818
NSN 6150-00-185-1023
NSN 2925-00-243-6841
NSN 5999-00-791-1322
NSN 5945-01-461-8143
NSN 5985-00-155-5991
NSN 6610-01-125-0776
NSN 5960-01-094-5958
NSN 5835-01-424-0054
NSN 5999-01-206-4657
NSN 2925-01-399-2765