Jaw Coupling Hub, Coupling Size MJS19, Outside Diameter 19.1 mm, Coupling Overall Length 27.2 mm, System of Measurement Metric, Hub Material Aluminum, Maximum Speed 8,000 RPM, Keyway Depth Not Applicable, Keyway Width Not Applicable, Bore Diameter 6 mm, Shaft Locking Type Set Screw, Bore Type Round Bore, Jaw Profile Curved, Screw Thread Size M3, Bore Tolerance +0.05/-0.00 mm, Fail Safe Yes, Shaft Tolerance +0.000/-0.013 mm, Full Bearing Support Required Yes, Hub Diameter 19.1 mm