Keyless Bushing Flange Type Flanged For Bore Diameter 90 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 130 mm Overall Width 50.5 mm System of Measurement Metric Finish Oil Dipped Hub Contact Pressure 27 099.036 psi Maximum Transmitted Torque 421 ft-lb Outside Diameter Tolerance +0/-.002 in