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 6320-01-384-7079
NSN 5998-00-938-4504
NSN 5998-01-508-8237
NSN 5935-01-370-5820
NSN 5910-00-925-4496
NSN 6610-01-076-0852
NSN 5999-01-043-8029
NSN 6650-01-409-1992
NSN 5996-00-098-3864
NSN 6645-01-020-4557
NSN 6220-01-298-2593
NSN 6145-01-449-4701