Keyless Bushing Flange Type Flanged For Bore Diameter 19 mm Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 30 mm Overall Width 31 mm System of Measurement Metric Finish Zinc Plated Hub Contact Pressure 10 375 psi Maximum Transmitted Torque 2 045 ft-lb Outside Diameter Tolerance +/-0.003