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 5935-01-502-9932
NSN 5855-00-862-3345
NSN 2925-01-387-0870
NSN 7035-00-470-4977
NSN 5996-00-086-9352
NSN 6105-01-459-9960
NSN 5975-00-529-3835
NSN 5855-01-641-2736
NSN 5975-00-441-2543
NSN 6145-01-642-0702
NSN 5935-00-773-3316
NSN 5985-01-108-4328