Keyless Bushing Flange Type Flanged For Bore Diameter 38 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 60.5 mm Overall Width 50 mm System of Measurement Metric Finish Zinc Plated Hub Contact Pressure 6 517 psi Maximum Transmitted Torque 8 187 ft-lb Outside Diameter Tolerance +/-0.003