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 6110-01-241-8816
NSN 6130-01-146-9715
NSN 5960-01-407-1350
NSN 5965-01-105-4194
NSN 4140-00-643-3744
NSN 5960-01-430-3911
NSN 5905-01-282-6050
NSN 7035-01-480-5537
NSN 5855-00-149-0766
NSN 6105-00-160-7804
NSN 5920-01-364-1335
NSN 5915-00-106-6951