Keyless Bushing Flange Type Not Applicable For Bore Diameter 1 in Keyless Bushing Type Multi-Screw Locking Assembly Material Carbon Steel Outside Diameter 1 31/32 in Overall Width 1.811 in System of Measurement Inch Hub Contact Pressure 14 939 psi Maximum Transmitted Torque 507 ft-lb Outside Diameter Tolerance +0.0013 in