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 2925-01-184-9604
NSN 5910-01-025-5408
NSN 5905-00-258-7116
NSN 6135-00-985-7846
NSN 6105-01-146-5036
NSN 6610-01-484-3024
NSN 5920-00-584-4592
NSN 7035-01-083-0282
NSN 6145-00-578-7522
NSN 5855-00-149-0766
NSN 6685-00-959-6767
NSN 6645-00-918-3785