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 5990-01-411-5930
NSN 5985-00-018-3325
NSN 5998-00-270-1179
NSN 5855-01-216-7633
NSN 6150-00-058-8669
NSN 5905-01-524-0035
NSN 5855-01-213-9076
NSN 5985-00-594-8824
NSN 5998-01-396-8981
NSN 5935-01-142-6490
NSN 6240-00-737-2775
NSN 6240-01-633-9357