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 5935-01-013-7223
NSN 5965-01-049-8307
NSN 6220-01-589-6532
NSN 6240-01-572-0194
NSN 5960-01-192-7710
NSN 5835-01-495-0595
NSN 5930-01-460-6298
NSN 6645-00-877-6002
NSN 6110-01-127-2852
NSN 5835-00-471-2660
NSN 5998-01-421-8463
NSN 4140-01-415-7988