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 6650-01-618-5317
NSN 6150-00-958-0473
NSN 5905-01-569-5566
NSN 4140-00-640-6608
NSN 6610-01-602-2132
NSN 5945-01-166-5239
NSN 2925-01-157-9204
NSN 5996-00-518-4880
NSN 7035-01-227-2546
NSN 6320-01-116-3980
NSN 5990-01-223-6321
NSN 5835-01-416-6449