Keyless Bushing Flange Type Flanged For Bore Diameter 100 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 145 mm Overall Width 57 mm System of Measurement Metric Finish Oil Dipped Hub Contact Pressure 29 886.313 psi Maximum Transmitted Torque 621 ft-lb Outside Diameter Tolerance +0/-.002 in