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 5996-01-324-2449
NSN 6145-01-393-8103
NSN 5996-01-078-1413
NSN 5915-00-027-7665
NSN 6220-01-658-4536
NSN 6105-00-596-9962
NSN 5920-00-510-7656
NSN 5835-01-157-5886
NSN 6135-01-354-5535
NSN 7035-01-369-1445
NSN 5855-00-560-0110
NSN 5835-00-673-2885