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 6685-00-961-4547
NSN 5925-01-490-6296
NSN 5835-01-241-1090
NSN 4140-01-093-1455
NSN 6685-01-150-6581
NSN 5895-01-655-3981
NSN 6105-01-278-5799
NSN 5905-01-508-9909
NSN 5920-01-634-0250
NSN 6320-01-387-3230
NSN 7035-00-465-3298
NSN 5950-00-058-0675