Climax Part C-075-DT, Mild Steel, Set Screw Collar, 3/4 inch bore, 1 1/4 inch OD, 9/16 inch Width, 5/16-18 x 1/4" Set Screw: Shaft Collars: Amazon.com: Industrial & Scientific
Climax Metal Products Shaft Collar, Clamp, 2Pc, 3/4 In, Steel 2C-075 | Zoro