Rigid Shaft Coupling, 1 Piece Clamp, Inch, Bore Dia. 1 in x 1-1/8 in, Stainless Steel, Finish Plain, Outside Dia. 2 3/16 in, Overall Length 2 3/16 in, Without Keyway, Clearance Dia. 2.188 in, Screw Size 1/4 In.-28, Max. Torque 1,330 in-lb, Max. RPM 4,000 RPM