Rigid Shaft Coupling, 2 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 1330 in.-lb., Max. RPM 4000