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 6320-00-004-9158
NSN 5915-01-411-6202
NSN 5975-01-025-5794
NSN 5960-01-224-7151
NSN 5920-01-512-4829
NSN 6240-00-186-6611
NSN 6145-00-800-3763
NSN 6105-00-105-9409
NSN 6620-01-171-9597
NSN 5960-00-116-1965
NSN 5935-01-435-4414
NSN 7035-01-150-6303