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 5855-00-149-0766
NSN 5915-01-363-1696
NSN 5996-01-174-0830
NSN 5960-01-171-1664
NSN 6130-01-423-8338
NSN 2925-01-510-9378
NSN 5998-00-801-4649
NSN 5910-01-072-6588
NSN 6135-00-134-6648
NSN 6650-00-438-3983
NSN 6645-01-416-9895
NSN 5895-01-429-9305