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 6145-00-441-2512
NSN 5975-00-719-9793
NSN 6645-01-491-5553
NSN 5996-01-529-4964
NSN 5975-01-276-4527
NSN 5935-01-144-9775
NSN 5999-01-296-8908
NSN 4140-01-107-3306
NSN 5960-01-045-3566
NSN 6110-01-337-7562
NSN 5895-01-576-7415
NSN 5920-00-180-4278