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 5990-01-546-1649
NSN 6130-01-343-1537
NSN 5998-01-422-5518
NSN 5960-01-173-2338
NSN 5975-00-917-7562
NSN 5990-00-389-0554
NSN 6105-00-419-2573
NSN 2925-01-485-8304
NSN 7035-01-623-0834
NSN 5895-01-378-7364
NSN 5915-00-473-2112
NSN 6320-00-139-1090