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 5996-01-535-6443
NSN 6110-00-259-9759
NSN 5910-00-375-1583
NSN 5905-01-089-0413
NSN 5999-01-198-7130
NSN 5915-00-400-5985
NSN 6610-01-047-7245
NSN 6650-00-930-8825
NSN 6135-01-168-2944
NSN 5965-00-847-2865
NSN 6130-00-089-9212
NSN 6145-01-070-6718