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 6110-01-091-6836
NSN 5855-01-383-6860
NSN 5985-01-444-1413
NSN 5999-00-913-9040
NSN 6320-01-462-2295
NSN 6620-01-178-7838
NSN 6105-01-391-7722
NSN 5990-01-492-1114
NSN 6620-01-397-8403
NSN 6220-01-534-3965
NSN 6145-00-119-8201
NSN 6685-00-939-8353