Shaft Collar, System of Measurement Inch, Shaft Locking Type - Couplings 2 Piece Clamp, Bore Type - Collars Plain Bore, Bore Dia. 1 1/2 in, Material - Collars Black Oxide 1215 Lead Free Steel, Outside Dia. 60 mm, Width 15 mm, Clearance Dia. 65.6 mm, Screw Size M6, Screw Material Alloy Steel, Operating Temp. Range -40 Degrees to 350 Degrees F