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 5975-00-009-2725
NSN 5945-01-309-4735
NSN 6650-01-442-2596
NSN 5960-01-389-4055
NSN 6110-00-166-5039
NSN 6130-01-277-3755
NSN 2925-01-077-6867
NSN 5920-00-912-1324
NSN 5999-01-027-1810
NSN 2925-01-519-1707
NSN 6610-00-670-7803
NSN 6610-01-130-8885