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 5920-00-594-3124
NSN 6135-01-361-7567
NSN 5935-00-868-0467
NSN 6650-01-423-3767
NSN 5910-00-964-4545
NSN 7035-01-449-1846
NSN 5920-00-996-3633
NSN 5999-01-428-1662
NSN 5920-00-575-8826
NSN 6145-00-231-2185
NSN 5935-01-268-2278
NSN 6105-01-631-2139