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 6685-01-502-6422
NSN 5960-00-125-0026
NSN 7035-01-429-0431
NSN 5935-00-017-9692
NSN 5920-00-465-0594
NSN 6145-01-607-1045
NSN 4140-01-070-2238
NSN 6130-01-239-9831
NSN 5920-01-027-4560
NSN 6130-00-594-7072
NSN 6620-00-006-6418
NSN 5990-01-170-6081