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 5910-01-398-3553
NSN 5945-01-131-9892
NSN 6685-00-567-1178
NSN 5990-01-588-3999
NSN 5835-00-572-7445
NSN 5999-01-532-5764
NSN 5905-01-461-7995
NSN 5945-01-526-8430
NSN 5999-01-427-3702
NSN 6220-00-012-3620
NSN 2925-00-459-4519
NSN 5935-01-603-5691