Keyless Bushing Flange Type Not Applicable For Bore Diameter 25 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 55 mm Overall Width 46 mm System of Measurement Metric Finish Oil Dipped Hub Contact Pressure 42 885.112 psi Maximum Transmitted Torque 51 ft-lb Outside Diameter Tolerance +0/-.002 in