Sleeve Coupling Flange, Coupling Size 5, Maximum Speed 7,600 RPM, Maximum Torque 312 in-lb, Outside Diameter 3 1/4 in, Bore Type Round Keyed, Hub Diameter 1 7/8 in, Hub Material Carbon Steel, For Bushing Size Not Applicable, Bore Diameter 1/2 in, Length through Bore 1 3/64 in, System of Measurement Inch, Hub Body Length 29/64 in, Hub Type Flange Hub, Application Compressors, Conveyors, Motors, Pumps, Bore Tolerance +0.0005 in / +0.0015 in