Climax Part C-087-A, Aluminum, Set Screw Collar, 7/8 inch bore, 1 1/2 inch OD, 9/16 inch Width, 5/16-18 x 5/16" Set Screw: Shaft Collars: Amazon.com: Industrial & Scientific
Testrite Instrument Co., Inc. | Aluminum Shaft Collar with Set Screw
Aluminum Collar for Perfume Bottle - China Metal Collar for Perfume Bottle, Perfume Bottle Collars | Made-in-China.com
Cast Aluminum Collar – 2 piece – American Flagpole & Flag Co.