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 5835-01-548-5864
NSN 6645-00-580-9605
NSN 5999-01-147-4844
NSN 4140-01-460-4657
NSN 5935-01-322-2257
NSN 5960-00-725-7519
NSN 6685-01-426-8929
NSN 5905-01-187-8840
NSN 7035-01-024-9511
NSN 5925-00-983-5666
NSN 5895-01-342-8341
NSN 6220-01-534-2486