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 5895-00-473-8812
NSN 6650-00-552-5848
NSN 5950-01-189-2855
NSN 6610-01-455-0290
NSN 5975-01-578-6071
NSN 6620-01-445-4295
NSN 5835-01-199-5902
NSN 5895-01-026-5439
NSN 5930-00-912-0053
NSN 6620-01-174-8150
NSN 6220-00-968-6665
NSN 6650-00-710-0076