'Rigid Shaft Coupling, One Piece Clamp Type, With Keyway, Bore Dia. 1 In., Overall Length 2 In., Outside Dia. 2 In., Clearance Dia. (In.) 2, Screw Size (In.) 5/16-18 x 1/2, Keyway Width (In.) 3/16, Max. Torque (In.-Lbs.) 750, Max. RPM 1800, Steel Material'