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 6130-00-976-9550
NSN 5935-01-585-0816
NSN 2925-01-290-7060
NSN 6610-01-633-4179
NSN 5965-00-400-6228
NSN 5950-01-386-5784
NSN 6150-00-232-6568
NSN 5960-01-539-1956
NSN 6610-01-030-7226
NSN 6620-01-263-6697
NSN 5960-01-264-2087
NSN 7035-01-487-6481