Keyless Bushing Flange Type Flanged For Bore Diameter 1 in Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 1 3/4 in Overall Width 1.346 in System of Measurement Inch Finish Zinc Plated Hub Contact Pressure 9 489 psi Maximum Transmitted Torque 3 416 ft-lb Outside Diameter Tolerance +/-0.003