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 5910-01-020-7700
NSN 6240-01-507-6721
NSN 6620-00-147-6034
NSN 6645-00-522-4173
NSN 6150-01-563-3353
NSN 4140-00-405-2192
NSN 5999-01-258-9665
NSN 7035-00-135-4758
NSN 5895-01-578-4246
NSN 6650-01-388-8727
NSN 5950-01-553-5154
NSN 6320-01-462-2295