Keyless Bushing Flange Type Not Applicable For Bore Diameter 1 3/4 in Keyless Bushing Type Single Nut Locking Assembly Material Steel Outside Diameter 2 5/8 in Overall Width 3.125 in System of Measurement Inch Finish Oil Dipped Hub Contact Pressure 5 500 psi Maximum Transmitted Torque 833 ft-lb Outside Diameter Tolerance +/-0.003