Keyless Bushing Flange Type Flanged For Bore Diameter 28 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 1 7/8 in Overall Width 33 mm System of Measurement Metric Finish Oil Dipped Hub Contact Pressure 28 472.796 psi Maximum Transmitted Torque 364 ft-lb Outside Diameter Tolerance +0/-.002 in