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 6130-00-242-3691
NSN 5910-01-100-1161
NSN 5965-01-419-0476
NSN 6650-01-462-5879
NSN 4140-01-634-0330
NSN 6130-01-141-1585
NSN 6320-00-725-0754
NSN 5950-01-541-7272
NSN 6220-01-400-0637
NSN 5945-01-064-4879
NSN 6105-00-156-9084
NSN 5998-00-683-1333