QD Bushing - Cap Screws & Washers Common Interchanges M X 1-15/16 " Bore . Bore Diameter: 1.9375 in Bore Type: Finished Bore with Keyway and 1 Set Screw Bushing Size: M Keyway...QD Bushing - Cap Screws & Washers Common Interchanges M X 1-15/16 " Bore . Bore Diameter: 1.9375 in Bore Type: Finished Bore with Keyway and 1 Set Screw Bushing Size: M Keyway...