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Part Number 7A008006F, Two-Piece Split Clamp-Type Rigid Shaft Couplings On Stafford Manufacturing Corp.
25 inch to .25 inch Shaft Coupling - Max-Gain Systems
Set-Screw Shaft Coupler (1/4" Round Bore to 1/4" Round Bore)
Rod Coupler (Aluminum) | Lee Engineering
Wholesale Custom Steel connector flexible spring shaft coupling From m.alibaba.com
CLIMAX METAL PRODUCTS, 5/8 in Bore Dia 1, 1/2 in Bore Dia 2, Rigid Shaft Coupling - 29NL01|ISCC-062-050-S - Grainger
0.5 in. Hex and Keyed Shaft Coupling - AndyMark, Inc
RULAND MANUFACTURING, 25 mm Bore Dia 1, 25 mm Bore Dia 2, Rigid Shaft Coupling - 2ANW9|MSPX-25-25-SS - Grainger
Amazon.com: uxcell 8mm to 12mm Bore Rigid Coupling Set Screw L25XD20 Aluminum Alloy,Shaft Coupler Connector for 3D Printers, Motor Accessories,2pcs : Industrial & Scientific