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 5960-00-644-4982
NSN 6150-01-197-3886
NSN 5999-01-407-5864
NSN 6610-01-509-8469
NSN 6110-01-446-6060
NSN 6110-00-359-5571
NSN 5855-01-526-5993
NSN 6110-00-433-8014
NSN 4140-01-428-8785
NSN 5935-01-498-8427
NSN 5835-01-316-3255
NSN 6150-01-437-8666