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 6650-01-280-8456
NSN 5905-01-092-5615
NSN 5998-01-020-1651
NSN 6105-01-266-9085
NSN 5945-01-307-9190
NSN 5975-00-430-8082
NSN 5945-00-434-9673
NSN 5910-00-963-1795
NSN 6145-00-166-3835
NSN 5915-01-115-0809
NSN 4140-01-592-3151
NSN 6685-01-421-1113