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 5935-01-610-4301
NSN 5965-01-424-0542
NSN 5920-01-074-6865
NSN 6110-01-183-0699
NSN 7035-01-026-0117
NSN 6220-01-190-7542
NSN 5945-00-921-7726
NSN 5905-00-280-2747
NSN 5965-01-458-8669
NSN 6220-01-657-0004
NSN 7035-00-541-8516
NSN 5999-00-388-0584