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 5920-00-936-7565
NSN 6685-01-610-6230
NSN 5999-01-250-2623
NSN 5855-01-288-2271
NSN 6240-01-498-4719
NSN 6220-01-602-9275
NSN 5910-00-939-2401
NSN 6320-01-486-8004
NSN 5920-01-151-7888
NSN 5935-01-254-9400
NSN 6130-00-639-0666
NSN 6650-01-359-1770