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 5915-01-168-1176
NSN 6610-01-520-6889
NSN 4140-00-728-3097
NSN 5999-00-116-2776
NSN 5999-01-273-2425
NSN 6320-01-141-3791
NSN 5999-01-291-9432
NSN 6320-01-090-8296
NSN 6220-00-940-9752
NSN 6220-01-073-9518
NSN 5835-01-442-6482
NSN 5985-01-225-8353