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 6650-01-531-2439
NSN 7035-00-150-2379
NSN 5998-00-370-0650
NSN 6135-01-252-0315
NSN 5975-00-161-4947
NSN 5960-00-246-4623
NSN 5855-01-417-3250
NSN 6620-00-199-8734
NSN 6220-01-453-6330
NSN 6650-00-063-4484
NSN 2925-00-456-7627
NSN 5925-01-547-4304