Keyless Rigid Coupling Coupling Length 1.34 in Coupling Material Carbon Steel Included Screws 2.05 in For Motion Type 3 Zero Backlash Inch Screw Material 5/8 in Maximum Speed 0.63 in Resistance Properties Round Maximum Torque 1.18 in Fastener Tightening Torque 167 ft-lb Outside Diameter Oil Dipped Overhung Load Capacity +0.000 in / -0.003 in Bore Type 9 ft-lb System of Measurement Metric Length through Bore (3) Locking Screw Screw Length 30 mm Number of Locking Screws M6