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 6150-01-146-1235
NSN 5895-01-472-4404
NSN 5965-00-232-7395
NSN 6135-01-168-2944
NSN 5996-01-152-2948
NSN 4140-00-451-2195
NSN 4140-00-288-6898
NSN 5835-00-187-1481
NSN 6320-00-036-3688
NSN 6145-01-580-1025
NSN 6105-00-942-2297
NSN 6145-01-598-8511