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 6130-01-242-6635
NSN 6320-01-106-4414
NSN 6240-01-214-7746
NSN 5835-00-469-3395
NSN 6320-01-155-8295
NSN 5998-01-398-4866
NSN 6240-01-590-9891
NSN 5920-01-010-3293
NSN 5905-01-386-4483
NSN 5965-00-125-6984
NSN 6220-01-174-2035
NSN 5945-00-081-8553