Keyless Bushing Flange Type Not Applicable For Bore Diameter 48 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 80 mm Overall Width 42.5 mm System of Measurement Metric Finish Oil Dipped Hub Contact Pressure 28 888.874 psi Maximum Transmitted Torque 106 ft-lb Outside Diameter Tolerance +0/-.002 in