Sleeve Coupling Spacer Hub Coupling Size 7 Maximum Speed 5 250 RPM Maximum Torque 940 in-lb Outside Diameter 2 13/16 in Bore Type Round Keyed Hub Diameter 2 13/16 in Hub Material Cast Iron For Bushing Size Not Applicable Bore Diameter 1 3/8 in Length through Bore 1 15/32 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