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 5905-01-143-1004
NSN 5915-01-014-7877
NSN 5990-01-097-4721
NSN 5835-01-535-0948
NSN 4140-01-215-2191
NSN 5920-01-335-9527
NSN 6320-01-094-2634
NSN 7035-00-626-1958
NSN 6130-01-459-7168
NSN 5930-01-630-4346
NSN 6620-01-446-7290
NSN 6610-01-598-0950