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 5998-01-147-2712
NSN 6650-01-265-0650
NSN 6620-00-754-4914
NSN 6130-01-253-4050
NSN 5835-01-571-4083
NSN 4140-00-776-5906
NSN 5855-01-110-9564
NSN 5920-00-471-2548
NSN 6320-01-607-1491
NSN 6650-01-116-4650
NSN 5996-01-146-5765
NSN 4140-01-109-0451