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 5930-01-338-7441
NSN 6685-01-555-6575
NSN 6645-01-467-9983
NSN 5905-01-546-7610
NSN 6130-01-471-9546
NSN 5855-00-411-8688
NSN 5930-01-566-2720
NSN 5835-00-804-0569
NSN 5855-00-089-3974
NSN 5999-01-137-2362
NSN 5920-01-624-9252
NSN 5935-01-142-1241