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 5925-00-199-9565
NSN 5975-00-827-1107
NSN 5996-00-754-4057
NSN 5895-01-634-0630
NSN 5965-00-062-0559
NSN 6620-00-972-4137
NSN 5895-01-215-0413
NSN 5990-01-121-1175
NSN 6145-01-361-6684
NSN 6145-01-501-6548
NSN 5930-01-534-8619
NSN 6620-01-268-9693