Keyless Bushing Flange Type Not Applicable For Bore Diameter 55 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 85 mm Overall Width 32 mm System of Measurement Metric Finish Oil Dipped Hub Contact Pressure 35 767.898 psi Maximum Transmitted Torque 173 ft-lb Outside Diameter Tolerance +0/-.002 in