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 5930-01-167-8946
NSN 5999-01-456-5510
NSN 6105-00-189-0515
NSN 6150-01-495-0652
NSN 4140-01-450-0427
NSN 5998-01-243-5913
NSN 5985-01-235-0958
NSN 5905-01-634-0595
NSN 5965-00-726-3168
NSN 5950-01-057-3255
NSN 6610-00-146-3499
NSN 5950-00-631-0500