Rigid Shaft Coupling, Bore Diameter 1 5/16 in, Bore Diameter 2 5/16 in, Bore Type Round, Clearance Diameter 0.63 in, Coupling Construction One-Piece, Coupling Material Carbon Steel, Coupling Outside Diameter 5/8 in, Different Bore Sizes No, Keyway Depth 1 Not Applicable, Keyway Depth 2 Not Applicable, Minimum Bore Diameter 5/16 in, Keyway Width 1 Not Applicable, Keyway Width 2 Not Applicable, Maximum Bore Diameter 5/16 in, Maximum Speed 1,800 RPM, Maximum Torque 123 in-lb, Overall Length 1 in