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 6320-01-352-5653
NSN 5930-01-113-5992
NSN 4140-01-142-0254
NSN 5945-00-203-3315
NSN 5945-00-419-8271
NSN 5965-00-280-7816
NSN 5999-00-220-5713
NSN 4140-00-226-9807
NSN 5935-00-497-6222
NSN 6135-01-400-2947
NSN 5930-01-290-7758
NSN 5975-01-610-2924