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 5935-01-252-8707
NSN 6150-01-400-1121
NSN 5960-01-361-4574
NSN 5835-00-458-4392
NSN 5920-00-187-0260
NSN 5965-01-510-3456
NSN 5999-00-277-4257
NSN 5965-01-622-2775
NSN 6130-00-967-0475
NSN 5930-01-581-4805
NSN 5930-01-224-6561
NSN 2925-01-543-0073