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 6110-00-655-2937
NSN 5985-01-389-9497
NSN 5915-01-036-9023
NSN 6130-01-029-3357
NSN 5925-01-147-5725
NSN 5905-01-140-8425
NSN 5965-00-280-8506
NSN 2925-01-580-1527
NSN 6620-01-072-9372
NSN 5915-01-328-5854
NSN 5915-01-459-4959
NSN 6145-01-425-7810