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 6620-01-008-2715
NSN 5985-00-019-3612
NSN 6110-00-256-6614
NSN 6135-01-185-1057
NSN 6685-01-481-4374
NSN 6105-00-780-3405
NSN 7035-01-230-0250
NSN 5998-01-441-1894
NSN 5945-01-604-2229
NSN 5920-01-467-3246
NSN 5920-00-835-6013
NSN 5895-01-344-4469