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 6220-01-141-6900
NSN 6135-01-593-9256
NSN 5975-01-358-0357
NSN 6685-01-361-7594
NSN 5990-00-446-0518
NSN 5835-00-136-2322
NSN 6320-01-600-5808
NSN 5975-01-508-3731
NSN 5999-00-469-5031
NSN 6220-01-550-2373
NSN 5975-00-411-6294
NSN 6135-01-315-9214