Shaft Collar, System of Measurement Inch, Shaft Locking Type - Couplings 2 Piece Clamp, Bore Type - Collars Plain Bore, Bore Dia. 1 1/8 in, Material - Collars Stainless Steel, Outside Dia. 1 7/8 in, Width 3/64 in, Clearance Dia. 2.187 in, Screw Size 1/4 In. -28, Screw Material Stainless Steel, Operating Temp. Range -40 Degrees to 800 Degrees F