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 Zinc Plated Hub Contact Pressure 20 627 psi Maximum Transmitted Torque 284 ft-lb Outside Diameter Tolerance +0.003 in