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 6620-01-039-5468
NSN 5930-00-736-6082
NSN 5999-00-432-5771
NSN 6110-00-141-1966
NSN 5965-00-318-6479
NSN 5855-01-020-7982
NSN 6145-01-561-2779
NSN 2925-00-583-9669
NSN 2925-01-076-5219
NSN 2925-00-939-1979
NSN 6320-00-394-8458
NSN 6320-01-089-9086