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 6110-00-627-7872
NSN 5998-01-225-2917
NSN 6150-01-107-8623
NSN 6620-01-268-9693
NSN 6320-01-078-8257
NSN 5975-00-990-7024
NSN 5930-01-210-8884
NSN 5999-01-074-4768
NSN 6110-01-158-8779
NSN 5999-00-049-9726
NSN 5990-00-518-0684
NSN 5920-00-132-3115