Keyless Bushing Flange Type Not Applicable For Bore Diameter 1 3/8 in Keyless Bushing Type Multi-Screw Locking Assembly Material Carbon Steel Outside Diameter 2 23/64 in Overall Width 0.773 in System of Measurement Inch Hub Contact Pressure 15 360 psi Maximum Transmitted Torque 550 ft-lb Outside Diameter Tolerance +0.0015 in