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 5935-01-403-2844
NSN 5925-01-147-8848
NSN 6650-00-769-3003
NSN 5985-00-081-9142
NSN 5965-00-236-0016
NSN 5945-01-326-8551
NSN 5960-01-216-7004
NSN 6105-01-495-1492
NSN 5960-00-034-7925
NSN 6150-00-063-8715
NSN 6320-00-174-1362
NSN 5895-00-800-3224