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 5915-00-599-5546
NSN 6645-01-553-3599
NSN 7035-00-116-1900
NSN 6220-00-024-5355
NSN 6220-01-634-0660
NSN 5910-01-435-0204
NSN 6220-01-073-9518
NSN 6610-01-364-0294
NSN 4140-01-146-5409
NSN 5996-01-071-4828
NSN 6610-01-336-8027
NSN 6320-01-504-3948