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 6105-01-013-2749
NSN 5935-00-373-1990
NSN 5975-01-509-8680
NSN 5835-00-198-4936
NSN 5930-00-917-9863
NSN 5925-00-622-2294
NSN 5990-00-488-1091
NSN 6610-00-684-7683
NSN 5835-01-386-0110
NSN 6610-00-962-3723
NSN 5975-01-557-4833
NSN 5965-01-578-7378