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 6130-01-602-4034
NSN 5935-00-542-2265
NSN 5985-01-425-5849
NSN 5905-01-355-0334
NSN 5985-01-116-2295
NSN 5996-00-320-2798
NSN 6240-01-502-2530
NSN 6610-00-236-7175
NSN 6610-01-083-1528
NSN 5910-01-352-3338
NSN 5935-01-556-7018
NSN 5965-01-050-8447