Shaft Collar, System of Measurement Inch, Bore Type Round, Bore Diameter 7/16 in, Bore Thread Size Not Applicable, Collar Outside Diameter 15/16 in, Inside Height to Flat Not Applicable, Clearance Diameter 1 in, Collar Width 3/8 in, Collar Material Carbon Steel, Keyway Width Not Applicable, Collar Material Grade 1045, Keyway Depth Not Applicable, Thread Direction Not Applicable, Center to Lever Top Not Applicable, Collar Construction 1-Piece, Collar Material Finish Black Oxide