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 6110-01-306-7255
NSN 6620-00-124-9515
NSN 5930-01-419-1487
NSN 5905-01-113-4773
NSN 6620-01-067-8336
NSN 5905-01-627-3542
NSN 6320-01-560-7177
NSN 5835-01-227-2318
NSN 7035-00-834-2090
NSN 5998-01-417-1902
NSN 6650-00-963-1692
NSN 5960-01-467-7516