Sleeve Coupling Flange Coupling Size 4 Maximum Speed 7 600 RPM Maximum Torque 156 in-lb Outside Diameter 2 1/2 in Bore Type Round Keyed Hub Diameter 1 5/8 in Hub Material Carbon Steel For Bushing Size Not Applicable Bore Diameter 1 in Length through Bore 55/64 in System of Measurement Inch Hub Body Length 27/64 in Hub Type Flange Hub Application Compressors Conveyors Motors Pumps Bore Tolerance +0.0005 in / +0.0015 in