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 4140-00-358-5312
NSN 5925-01-331-8636
NSN 5920-01-080-1441
NSN 6650-00-486-7924
NSN 6145-01-576-4743
NSN 5905-00-702-5886
NSN 5855-00-466-2309
NSN 6610-01-539-0014
NSN 6150-01-650-2596
NSN 6240-01-372-5894
NSN 5905-00-195-2684
NSN 6620-01-397-8683