Shaft Collar, System of Measurement Inch, Shaft Locking Type - Couplings 1 Piece Set Screw, Bore Type - Collars Plain Bore, Bore Dia. 3/4 in, Material - Collars Stainless Steel, Outside Dia. 1 1/4 in, Width 9/16 in, Screw Size 5/16 In. -18, Standards REACH Compliant, RoHS2 Compliant