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 4140-01-212-3113
NSN 6240-01-399-8573
NSN 6240-01-049-2871
NSN 5930-01-391-5093
NSN 6610-01-231-9283
NSN 5998-01-475-6279
NSN 5945-01-430-2222
NSN 6150-01-306-7824
NSN 5895-01-630-8291
NSN 5895-00-146-7987
NSN 6145-01-223-0282
NSN 5935-00-539-9178