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 5855-01-042-7990
NSN 6110-00-351-8996
NSN 6105-01-445-3655
NSN 4140-01-051-0421
NSN 5990-00-455-4864
NSN 6650-01-582-2486
NSN 5920-00-892-2640
NSN 6110-00-374-4805
NSN 5905-01-055-7491
NSN 5930-01-552-3511
NSN 6145-00-468-3583
NSN 4140-01-419-0198