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 6130-00-932-1381
NSN 6105-01-168-8335
NSN 5996-01-250-1644
NSN 5915-01-219-6298
NSN 5935-01-510-2072
NSN 6130-01-437-6785
NSN 2925-01-655-4455
NSN 5990-00-093-6794
NSN 5945-00-948-0664
NSN 5910-01-124-3651
NSN 5855-00-198-3197
NSN 6240-00-580-0666