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 6320-00-149-7570
NSN 5990-00-495-2859
NSN 5998-01-504-9623
NSN 6220-01-634-0660
NSN 5930-01-408-4632
NSN 6110-00-754-7926
NSN 5915-01-053-8968
NSN 6240-00-068-5228
NSN 6135-00-196-5267
NSN 5965-00-934-3495
NSN 5895-00-782-6391
NSN 6610-01-042-2279