Keyless Bushing Flange Type Not Applicable For Bore Diameter 1 in Keyless Bushing Type Single Nut Locking Assembly Material Steel Outside Diameter 1 3/4 in Overall Width 1.875 in System of Measurement Inch Finish Oil Dipped Hub Contact Pressure 9 400 psi Maximum Transmitted Torque 292 ft-lb Outside Diameter Tolerance +/-0.003