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 5965-00-827-9680
NSN 5990-00-829-8960
NSN 5920-01-283-2611
NSN 6620-00-170-5296
NSN 5855-01-147-6024
NSN 5835-01-498-9410
NSN 5910-00-573-0169
NSN 5905-01-392-0540
NSN 6150-01-630-2678
NSN 5915-01-633-9845
NSN 6220-01-032-3684
NSN 5996-01-413-3353