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 2925-00-101-7972
NSN 5945-00-117-8980
NSN 5996-00-265-7067
NSN 5996-01-083-0642
NSN 5915-01-308-8562
NSN 5835-01-342-7975
NSN 2925-00-594-1157
NSN 7035-00-997-6212
NSN 5895-01-421-2690
NSN 5999-01-327-3067
NSN 5945-01-366-7948
NSN 6110-00-581-4445