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 4140-01-615-7625
NSN 5895-01-450-3300
NSN 5990-01-421-5342
NSN 5965-01-378-7335
NSN 5915-00-679-3093
NSN 6220-01-023-5596
NSN 5945-00-161-4014
NSN 5998-01-142-3072
NSN 5915-01-288-5929
NSN 6150-01-576-8255
NSN 6130-00-115-2933
NSN 5895-01-182-7291