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 6150-01-578-0381
NSN 6105-01-620-9398
NSN 6130-01-080-4838
NSN 5915-00-148-0067
NSN 6110-00-482-3372
NSN 4140-01-482-8447
NSN 5895-01-510-8974
NSN 6220-00-922-3714
NSN 2925-01-430-4206
NSN 5920-01-121-8022
NSN 5925-01-138-1333
NSN 6150-01-377-4883