Shaft Collar, System of Measurement Inch, Shaft Locking Type - Couplings 1 Piece Clamp, Bore Type - Collars Plain Bore, Bore Dia. 1 7/8 in, Material - Collars Stainless Steel, Outside Dia. 2 7/8 in, Width 11/16 in, Clearance Dia. 3.187 in, Screw Size 5/16 In. -24, Screw Material Stainless Steel, Operating Temp. Range -40 Degrees to 800 Degrees F. This item has been restricted from sale in the following state (s): []