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 4140-01-483-1662
NSN 5996-01-371-2958
NSN 5996-01-633-7979
NSN 6650-01-066-0420
NSN 6105-01-106-3221
NSN 5910-01-527-7907
NSN 6135-01-482-7901
NSN 5895-00-761-3034
NSN 5996-00-484-9196
NSN 6610-00-339-2981
NSN 6110-00-271-9928
NSN 6240-00-421-5368