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 6320-01-177-3192
NSN 5945-00-109-4504
NSN 5915-00-597-2369
NSN 6685-00-897-5824
NSN 6150-01-588-6873
NSN 5998-01-634-0604
NSN 5985-01-146-4141
NSN 5855-00-791-5000
NSN 5895-01-475-1849
NSN 4140-00-785-1962
NSN 5950-00-721-5642
NSN 5930-01-134-6958