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 6110-01-210-7861
NSN 5998-00-203-1232
NSN 6220-01-508-5299
NSN 6105-00-056-8020
NSN 5998-00-029-8940
NSN 5996-01-661-0915
NSN 6610-00-419-0315
NSN 5999-01-442-4750
NSN 6135-01-052-9634
NSN 5998-00-489-1254
NSN 5975-00-924-9927
NSN 6610-01-259-5296