Ruland MDCD19-5-5-A, 5mm X 5mm Double Disc Coupling, Aluminum, Clamp Style, 19.1mm OD, 30.2mm Length

Ruland MBC15-6-5-A, 6mm X 5mm Bellows Coupling, High Stiffness, Aluminum, 15.0Mm, OD 27.3mm Length

Ruland MRSC16-5-5-A, 5mm X 5mm Short Slit Coupling, Aluminum, Clamp Style, 16.0mm OD, 19.8mm Length

Uxcell 5mm To 5mm Bore Rigid Coupling Set Screw L25XD14 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories,Black,2Pcs | Harfington

Uxcell Shaft Coupling 5mm To 5mm Bore L30xd25 Flexible Coupler Joint For Servo Stepped Motor | Harfington

Uxcell 5mm To 5mm Bore Rigid Coupling 25mm Length 18mm Diameter Aluminum Alloy Shaft Coupler Connector Silver 4Pcs | Harfington

Uxcell Shaft Coupling 5mm To 5mm Bore L20xd12 Robot Motor Wheel Rigid Connector Red | Harfington

Uxcell 5mm To 5mm Bore Rigid Coupling, 20mm Length 9mm Diameter, Copper Shaft Coupler Connector, Brass Tone 2Pcs | Harfington