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 6220-01-339-4638
NSN 6150-00-926-2964
NSN 5975-01-619-9895
NSN 6135-00-027-3914
NSN 5930-01-552-3240
NSN 5998-01-395-5178
NSN 6105-00-248-4202
NSN 6220-00-888-1229
NSN 5960-01-624-1170
NSN 6110-01-062-2208
NSN 6620-00-783-9560
NSN 2925-01-016-0876