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 6135-01-659-5393
NSN 5895-01-078-1987
NSN 6240-01-050-8306
NSN 5905-01-634-0595
NSN 6110-00-837-7903
NSN 5910-01-255-6559
NSN 6135-01-487-6275
NSN 6685-01-423-9681
NSN 4140-01-259-8083
NSN 6105-01-591-0319
NSN 6320-00-937-5625
NSN 5925-00-594-0840