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 5930-01-549-2295
NSN 6320-01-029-4220
NSN 6320-01-237-9746
NSN 5915-01-135-2930
NSN 4140-01-358-5141
NSN 5975-01-448-7836
NSN 5945-01-274-3549
NSN 5996-01-391-9585
NSN 5965-01-218-7795
NSN 5935-01-310-5424
NSN 5975-00-851-6085
NSN 6110-01-546-6925