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 5960-01-449-1310
NSN 5965-00-246-5612
NSN 5975-00-600-5847
NSN 5835-00-113-6090
NSN 5945-01-383-7259
NSN 4140-01-227-4674
NSN 5990-01-127-4853
NSN 5999-01-235-9984
NSN 5960-00-583-1534
NSN 7035-01-326-0868
NSN 5965-00-378-3403
NSN 6130-00-086-9502