Keyless Bushing Flange Type Flanged For Bore Diameter 10 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 15/16 in Overall Width 20.5 mm System of Measurement Metric Finish Oil Dipped Hub Contact Pressure 28 095.377 psi Maximum Transmitted Torque 27 ft-lb Outside Diameter Tolerance +0/-.002 in