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 6220-00-832-6916
NSN 5835-00-085-2287
NSN 6320-01-084-8186
NSN 4140-01-574-9229
NSN 5905-01-421-3901
NSN 5930-01-574-8121
NSN 5960-01-229-6324
NSN 5915-01-597-8873
NSN 6150-01-108-2068
NSN 5998-01-431-5839
NSN 6130-01-443-3761
NSN 5985-00-245-8753