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 5920-01-375-9629
NSN 6135-01-370-9441
NSN 2925-00-436-9837
NSN 6150-00-015-7284
NSN 5960-01-378-1729
NSN 5996-01-443-2324
NSN 6650-01-422-1037
NSN 5925-00-484-7695
NSN 6130-01-260-1917
NSN 6130-01-026-0258
NSN 5905-01-100-4759
NSN 7035-01-254-3044