Rigid Shaft Coupling, Bore Diameter 1 3/8 in, Bore Diameter 2 3/8 in, Bore Type Round, Clearance Diameter 1.03 in, Coupling Construction Two-Piece, Coupling Material Carbon Steel, Coupling Outside Diameter 7/8 in, Different Bore Sizes No, Keyway Depth 1 Not Applicable, Keyway Depth 2 Not Applicable, Minimum Bore Diameter 3/8 in, Keyway Width 1 Not Applicable, Keyway Width 2 Not Applicable, Maximum Bore Diameter 3/8 in, Maximum Speed 4,000 RPM, Maximum Torque 475 in-lb, Overall Length 1 3/8 in