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 6150-01-411-0811
NSN 5895-00-492-1431
NSN 5905-00-024-0467
NSN 5915-01-325-6098
NSN 5935-01-501-0210
NSN 5945-00-583-8600
NSN 6145-01-623-6259
NSN 6110-00-701-4415
NSN 5999-01-049-8007
NSN 5985-00-134-1290
NSN 6320-00-575-6072
NSN 5935-01-147-4977