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 5855-01-061-6890
NSN 5996-01-303-6882
NSN 5975-01-372-8691
NSN 4140-01-024-7129
NSN 5999-01-027-1714
NSN 2925-01-178-0063
NSN 6130-01-292-2590
NSN 6220-00-933-3187
NSN 5915-01-381-0419
NSN 5935-01-420-3803
NSN 5965-01-128-7785
NSN 5950-00-358-1140