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 5990-01-212-2037
NSN 6135-01-329-7994
NSN 5965-00-173-4440
NSN 6135-01-472-9011
NSN 4140-00-393-6279
NSN 5855-01-498-3065
NSN 6320-00-004-9158
NSN 6620-01-352-5640
NSN 5905-01-634-0595
NSN 5996-01-504-2065
NSN 6110-01-445-7377
NSN 5990-00-398-0507