Shaft Collar System of Measurement Inch Bore Type Round Bore Diameter 2 in Bore Thread Size Not Applicable Collar Outside Diameter 3 in Inside Height to Flat Not Applicable Clearance Diameter 3.07 in Collar Width 11/16 in Collar Material Stainless Steel Keyway Width Not Applicable Collar Material Grade 304 Keyway Depth Not Applicable Thread Direction Not Applicable Center to Lever Top Not Applicable Collar Construction 1-Piece Screw Thread Size 5/16 In.-24