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 2925-01-648-6859
NSN 5996-01-014-8559
NSN 7035-01-601-1493
NSN 5835-01-432-1277
NSN 4140-01-469-6140
NSN 6150-00-917-6749
NSN 5935-01-293-6568
NSN 6110-01-571-7020
NSN 6320-00-422-9006
NSN 5996-01-274-6460
NSN 5915-00-246-0596
NSN 6320-01-627-8295