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 6650-01-519-9165
NSN 6105-01-280-0047
NSN 5895-01-192-9872
NSN 6135-01-508-3784
NSN 5998-00-358-0452
NSN 6320-01-333-5782
NSN 5930-01-093-6699
NSN 5910-00-633-7743
NSN 5960-01-599-9821
NSN 5975-01-381-5747
NSN 5998-00-386-7051
NSN 4140-01-553-2140