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 6220-01-585-6892
NSN 6645-01-062-0905
NSN 4140-01-597-2287
NSN 5925-01-578-8889
NSN 5925-01-555-4363
NSN 5999-00-126-4918
NSN 5965-00-063-9558
NSN 6105-01-027-1135
NSN 5855-00-149-0766
NSN 6685-00-403-8254
NSN 6150-00-827-0081
NSN 5930-01-487-4842