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 5895-01-308-4204
NSN 6650-01-571-0151
NSN 6220-00-301-2098
NSN 5998-01-036-9623
NSN 6150-01-034-1622
NSN 5998-01-465-6317
NSN 5990-00-931-0594
NSN 5925-01-237-5229
NSN 6105-01-288-6428
NSN 6240-00-421-5368
NSN 5835-00-523-0736
NSN 6110-01-210-4101