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 6620-01-462-5196
NSN 5945-01-625-9746
NSN 5915-01-461-5285
NSN 6135-01-260-7180
NSN 6320-01-292-2232
NSN 5965-00-281-0319
NSN 5910-00-518-1009
NSN 5915-01-262-1159
NSN 5965-01-388-3492
NSN 5915-01-235-4595
NSN 2925-01-394-9658
NSN 6135-01-357-0621