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 5999-01-032-5527
NSN 6145-01-187-3989
NSN 6320-01-334-9840
NSN 6220-01-180-3703
NSN 5835-01-291-3201
NSN 5835-00-921-1662
NSN 6150-00-518-2743
NSN 5920-01-291-4946
NSN 4140-00-269-5795
NSN 5935-00-816-8247
NSN 6145-01-098-9319
NSN 6220-00-333-2433