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 4140-01-146-5409
NSN 6320-00-809-5744
NSN 6135-00-078-3095
NSN 6150-01-090-5153
NSN 5960-01-612-9844
NSN 4140-01-577-2737
NSN 6650-01-150-0043
NSN 4140-01-085-4965
NSN 5925-01-147-5197
NSN 6110-01-657-4852
NSN 6130-00-401-7892
NSN 5996-01-146-5765