Sleeve Coupling Spacer Hub, Coupling Size 6, Maximum Speed 6,000 RPM, Maximum Torque 585 in-lb, Outside Diameter 2 1/2 in, Bore Type Round Keyed, Hub Diameter 2 1/2 in, Hub Material Cast Iron, For Bushing Size Not Applicable, Bore Diameter 1 in, Length through Bore 1 7/32 in, System of Measurement Inch, Hub Body Length Not Applicable, Hub Type Spacer Hub, Application Compressors, Conveyors, Motors, Pumps, Bore Tolerance +0.0005 in / +0.0015 in