Keyless Rigid Coupling Coupling Length 68.1 mm Coupling Material Carbon Steel Included Screws 112 mm For Motion Type 10 Zero Backlash Metric Screw Material 54 mm Maximum Speed 54 mm Resistance Properties Round Maximum Torque 59.9 mm Fastener Tightening Torque 4 931 N-m Outside Diameter Oil Dipped Overhung Load Capacity +0.000 mm / -0.152 mm Bore Type 30 N-m System of Measurement Metric Length through Bore (10) Locking Screw Screw Length 50 mm Number of Locking Screws M8