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 5945-00-363-9481
NSN 6220-00-186-8565
NSN 5925-01-442-5795
NSN 6135-00-918-6993
NSN 5999-01-243-7671
NSN 6610-01-338-0628
NSN 5855-01-013-6864
NSN 2925-01-633-4048
NSN 6610-01-557-1486
NSN 5895-01-258-4120
NSN 5925-01-508-4145
NSN 6685-01-143-0199