Shaft Collar, System of Measurement Inch, Shaft Locking Type - Couplings 2 Piece Clamp with Keyway, Bore Type - Collars Plain Bore, Bore Dia. 5/8 in, Material - Collars Black Oxide 1215 Lead Free Steel, Outside Dia. 1 5/16 in, Width 7/16 in, Clearance Dia. 1.5 in, Screw Size #10-32, Screw Material Alloy Steel, Operating Temp. Range -40 Degrees to 350 Degrees F