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 5990-00-683-1095
NSN 5998-01-399-0569
NSN 5990-01-064-1013
NSN 5835-00-233-6327
NSN 7035-01-524-4151
NSN 6105-01-471-8085
NSN 6150-00-596-9882
NSN 6110-00-009-6787
NSN 6150-01-173-3957
NSN 6620-00-371-5903
NSN 2925-01-072-7101
NSN 5930-01-132-2241