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 6620-01-189-8153
NSN 5960-01-425-1454
NSN 5930-00-633-8008
NSN 5945-01-005-3861
NSN 5935-01-652-1526
NSN 6130-00-403-1439
NSN 7035-00-349-8571
NSN 6320-00-779-5923
NSN 6150-01-359-5710
NSN 5985-01-226-0965
NSN 5930-01-050-7163
NSN 5895-01-530-2602