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 5915-00-636-4238
NSN 5999-01-421-3388
NSN 5835-01-227-2318
NSN 6145-01-583-0593
NSN 6110-00-196-0625
NSN 5855-00-256-5562
NSN 7035-00-916-9380
NSN 6110-00-363-3974
NSN 5975-01-437-9566
NSN 5855-01-279-5316
NSN 6610-00-641-3015
NSN 6220-01-294-7164