Keyless Bushing Flange Type Not Applicable For Bore Diameter 1 3/4 in Keyless Bushing Type Multi-Screw Locking Assembly Material Steel Outside Diameter 2 15/16 in Overall Width 2.126 in System of Measurement Inch Finish Oil Dipped Hub Contact Pressure 21 598 psi Maximum Transmitted Torque 2 347 ft-lb