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 5950-00-959-7488
NSN 6220-01-260-6110
NSN 5915-01-358-7346
NSN 6135-01-079-7852
NSN 5998-00-305-4087
NSN 6105-01-220-2895
NSN 5920-00-960-7614
NSN 5950-01-320-2844
NSN 6130-01-561-5727
NSN 5965-00-142-9052
NSN 5996-00-122-3788
NSN 6320-00-149-7570