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 2925-00-880-4061
NSN 6320-01-397-9995
NSN 5935-01-147-1127
NSN 5910-01-286-1213
NSN 5895-01-043-5005
NSN 5925-00-421-2802
NSN 5925-01-533-8793
NSN 5965-00-340-6790
NSN 2925-01-225-0713
NSN 5895-01-268-1467
NSN 6150-01-244-5477
NSN 5999-01-239-3432