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 6240-00-646-6931
NSN 5895-01-548-1122
NSN 6610-01-421-3987
NSN 5990-01-557-7784
NSN 6130-01-534-0000
NSN 6110-01-083-3604
NSN 6240-01-501-5688
NSN 5960-01-040-7114
NSN 6320-01-422-1212
NSN 5905-00-263-3453
NSN 5998-01-414-7244
NSN 5915-01-432-2491