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 5999-00-161-3421
NSN 5945-01-322-4908
NSN 4140-00-116-1022
NSN 5835-00-678-6981
NSN 6650-01-447-2858
NSN 4140-00-552-7370
NSN 5945-00-087-9724
NSN 5990-01-369-6915
NSN 5855-01-175-2465
NSN 5945-01-005-0328
NSN 5935-00-398-1584
NSN 5965-01-570-4711