Shaft Collar, System of Measurement Inch, Shaft Locking Type - Couplings 1 Piece Set Screw, Bore Type - Collars Plain Bore, Bore Dia. 3 in, Material - Collars Aluminum, Outside Dia. 4 in, Width 1 1/8 in, Clearance Dia. 4 in, Screw Size 1/2 In. -13 x 1/2 in, Screw Material Steel, Operating Temp. Range -40 Degrees to 220 Degrees F. This item has been restricted from sale in the following state (s): []