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 5930-01-364-1077
NSN 6685-01-075-1743
NSN 5996-01-367-6557
NSN 6610-01-147-9072
NSN 5895-01-077-0107
NSN 5905-01-355-2411
NSN 5935-01-589-8238
NSN 5920-00-189-4657
NSN 6610-00-207-4207
NSN 2925-00-486-8640
NSN 6685-01-413-4389
NSN 5975-01-342-2292