Keyless Bushing Flange Type Flanged For Bore Diameter 1 1/4 in Keyless Bushing Type Multi-Screw Locking Assembly Material Carbon Steel Outside Diameter 2 1/8 in Overall Width 1.102 in System of Measurement Inch Hub Contact Pressure 16 957 psi Maximum Transmitted Torque 402 ft-lb Outside Diameter Tolerance +.0018 in