Keyless Bushing Flange Type Flanged For Bore Diameter 7/8 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 2 992 ft-lb Outside Diameter Tolerance +/-0.003