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 5920-01-412-1080
NSN 5975-01-420-2605
NSN 5990-00-838-1082
NSN 6220-01-186-4500
NSN 5910-01-156-8546
NSN 5965-01-606-5393
NSN 6145-01-368-6165
NSN 5855-01-384-7120
NSN 5996-00-679-3764
NSN 6685-00-996-7359
NSN 5996-01-440-8935
NSN 7035-01-392-5274