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 5915-00-007-3813
NSN 5915-00-456-0243
NSN 6105-01-607-0381
NSN 5925-01-081-2893
NSN 5935-01-287-0705
NSN 6650-01-244-8559
NSN 6650-01-604-9315
NSN 5990-01-352-5255
NSN 6220-00-221-5899
NSN 5996-01-487-4377
NSN 5965-01-590-9610
NSN 6150-01-581-8141