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 5910-01-477-5264
NSN 6620-01-364-7461
NSN 5960-01-613-6113
NSN 5998-01-434-4834
NSN 5895-01-320-8472
NSN 5895-01-055-6235
NSN 6240-01-131-4454
NSN 6135-01-373-2518
NSN 7035-01-535-1450
NSN 5855-00-149-0766
NSN 6240-01-633-9357
NSN 5905-00-778-5119