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 5998-01-264-5460
NSN 6110-00-377-3220
NSN 5985-00-471-5695
NSN 5996-01-147-7378
NSN 6220-01-358-9975
NSN 6320-01-416-9357
NSN 6320-01-090-8296
NSN 4140-01-658-6870
NSN 6145-01-104-5084
NSN 5999-01-173-7927
NSN 6320-01-253-1028
NSN 5935-00-459-4530