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 5855-01-622-5992
NSN 5950-00-357-3282
NSN 5960-01-503-0362
NSN 5985-01-629-8837
NSN 5895-00-149-1110
NSN 5990-01-232-2625
NSN 5855-00-631-4565
NSN 5905-01-452-7323
NSN 5945-01-384-5448
NSN 6320-00-024-1004
NSN 5920-00-900-0220
NSN 7035-01-074-2343