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 6240-01-409-2465
NSN 5925-01-571-1997
NSN 5950-00-186-9713
NSN 5920-00-403-7518
NSN 5990-00-212-4316
NSN 5965-01-415-0872
NSN 6645-01-396-6976
NSN 6650-00-276-9838
NSN 5930-01-521-1111
NSN 6650-00-617-3984
NSN 5960-01-462-1864
NSN 5920-01-645-8052