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 5910-00-035-5534
NSN 6685-00-572-1519
NSN 5985-01-605-2470
NSN 6145-00-062-0552
NSN 5935-01-045-8284
NSN 5998-01-442-3206
NSN 6135-00-491-9864
NSN 5985-01-632-6609
NSN 6320-00-400-8042
NSN 6145-01-406-5022
NSN 6620-00-254-8985
NSN 5985-01-593-2196