Keyless Rigid Coupling Coupling Length 43.9 mm Coupling Material Carbon Steel Included Screws 66 mm For Motion Type 7 Zero Backlash Metric Screw Material 25 mm Maximum Speed 25 mm Resistance Properties Round Maximum Torque 38.1 mm Fastener Tightening Torque 832 N-m Outside Diameter Oil Dipped Overhung Load Capacity +0.000 mm / -0.152 mm Bore Type 12 N-m System of Measurement Metric Length through Bore (7) Locking Screw Screw Length 35 mm Number of Locking Screws M6