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 5950-00-614-8709
NSN 5985-01-592-9285
NSN 5945-01-561-7973
NSN 6320-00-174-1362
NSN 7035-00-286-6221
NSN 6320-01-067-0474
NSN 5930-01-197-0251
NSN 6650-00-500-6455
NSN 5915-01-284-8905
NSN 5910-00-147-2604
NSN 5990-01-533-1347
NSN 6220-01-137-2848