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 6650-01-113-7563
NSN 5999-01-032-4924
NSN 6145-01-208-3678
NSN 5960-01-008-8902
NSN 5835-00-655-1000
NSN 5835-00-301-3812
NSN 5855-01-604-9997
NSN 5855-00-832-9341
NSN 6620-01-313-8164
NSN 6105-01-323-7679
NSN 5895-00-170-4568
NSN 6320-01-484-7734