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 7035-01-564-4617
NSN 5999-00-173-1118
NSN 5915-00-265-0967
NSN 6130-00-954-2859
NSN 6620-00-613-3023
NSN 5945-00-326-1839
NSN 5925-00-959-4983
NSN 2925-01-294-4125
NSN 6645-01-487-8227
NSN 6145-00-663-6133
NSN 2925-00-168-2287
NSN 5930-01-386-3068