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 6150-00-458-2552
NSN 5920-00-518-1789
NSN 6110-00-926-0781
NSN 6620-01-376-2150
NSN 5920-00-155-2173
NSN 5920-01-290-1606
NSN 6150-01-163-8654
NSN 5855-01-343-2933
NSN 2925-01-295-2017
NSN 5999-01-632-9979
NSN 5895-00-232-5355
NSN 6220-01-430-7021