Used on nuclear power plants. 1.240" overall length 30.7mm overall width instead of unthreaded mounting holes, this flange has unthreaded ovals, 0.128" wide by 0.173" long.
termination connectors are PL155 bayonet plugor equivalent; length is 1.190inches; diameter is 0.450"; center hole to center hole on mounting tabs with chain is 6.000"