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 5910-01-093-5801
NSN 6220-01-062-2077
NSN 4140-01-443-2297
NSN 5905-00-401-7572
NSN 6685-01-619-1585
NSN 6320-01-209-0952
NSN 6110-01-657-6088
NSN 6320-01-173-7950
NSN 5925-00-862-6719
NSN 5920-00-128-9383
NSN 5915-01-147-7772
NSN 6620-01-628-2620