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 5835-01-566-5462
NSN 2925-01-534-7314
NSN 5960-01-609-6565
NSN 6610-01-462-5980
NSN 5855-01-364-1005
NSN 6320-00-841-2279
NSN 5920-01-142-7554
NSN 5998-00-811-6654
NSN 6320-00-089-9426
NSN 5905-01-129-9055
NSN 5965-01-323-7225
NSN 5975-00-914-5242