Shaft Collar, System of Measurement Inch, Bore Type Round, Bore Diameter 5/8 in, Bore Thread Size Not Applicable, Collar Outside Diameter 1 5/16 in, Inside Height to Flat Not Applicable, Clearance Diameter 1.56 in, Collar Width 7/16 in, Collar Material Plastic, Collar Material Grade Acetal, Collar Construction 1-Piece, Screw Thread Size #10-32