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 5915-01-511-5043
NSN 5998-01-173-1043
NSN 6610-01-349-6333
NSN 6320-01-300-7994
NSN 5855-01-634-0259
NSN 5930-00-280-2562
NSN 6110-01-523-8608
NSN 5975-00-642-8959
NSN 5950-01-634-0677
NSN 5925-00-130-2586
NSN 6150-01-146-1553
NSN 6650-01-604-9315