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 5950-01-238-0509
NSN 5945-00-089-9130
NSN 5935-01-530-3775
NSN 6130-01-207-8803
NSN 6320-00-433-2773
NSN 5930-01-119-1707
NSN 5996-01-254-9963
NSN 4140-00-911-7245
NSN 7035-01-642-9106
NSN 5835-01-416-6449
NSN 5998-01-169-8014
NSN 5950-01-375-6652