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 5975-00-827-5835
NSN 5925-01-378-2518
NSN 5905-00-466-0914
NSN 5999-00-109-6113
NSN 6150-01-519-9309
NSN 6220-01-126-4839
NSN 5999-00-081-0305
NSN 7035-00-495-2137
NSN 6620-00-753-0745
NSN 5855-01-466-1588
NSN 5945-01-380-3876
NSN 5990-01-650-9034