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 6620-01-231-2078
NSN 5910-01-360-0623
NSN 5835-01-178-4154
NSN 5910-01-213-0390
NSN 5910-01-364-0979
NSN 6650-01-372-7577
NSN 6620-01-631-7770
NSN 6620-01-361-8685
NSN 5998-01-518-2124
NSN 5910-01-028-1697
NSN 5915-01-529-6107
NSN 5996-00-489-0595