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 2925-00-624-9199
NSN 5925-00-556-7923
NSN 5855-01-020-2211
NSN 6130-00-144-8018
NSN 5945-00-890-3228
NSN 6105-00-721-2433
NSN 6145-00-975-2039
NSN 5855-01-400-1590
NSN 6105-00-997-6572
NSN 5855-00-058-1293
NSN 6105-00-498-0059
NSN 5999-01-445-6085