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 6610-00-527-8892
NSN 6130-01-350-3585
NSN 5910-01-643-6767
NSN 5930-00-035-9117
NSN 5910-00-769-5448
NSN 6105-00-460-3852
NSN 6320-00-186-6452
NSN 6145-01-579-3510
NSN 5996-00-375-5057
NSN 6150-00-147-3680
NSN 5960-01-487-6436
NSN 5835-00-415-6421