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 7035-00-870-0290
NSN 5915-01-406-5714
NSN 6645-01-509-7326
NSN 5945-01-597-7046
NSN 2925-01-542-1865
NSN 6650-00-992-4540
NSN 6610-01-129-8404
NSN 6220-00-153-9704
NSN 6320-00-194-4252
NSN 5855-00-610-4052
NSN 6220-00-669-5623
NSN 6220-01-095-0117