Brass Shaft Coupling Joint Connector For RC Motors 4mm To 4mm 20mm Long 9mm Outer Diameter M3 Thread Ideal For DIY Airplane Boat And Robot Builds Maintenance Free Corrosion Resistant
✔️ 12 brass couplings, M3 thread, 20mm long, 9mm OD, 4-4mm bore
This brass shaft coupling joins two shafts in small drive systems, ideal for RC airplanes, boats, robots, and DIY model builds where reliable torque transfer and compact size matter.
✅ Material: brass, corrosion-resistant, maintenance-free
✅ Bore: 4mm-4mm
✅ Outer diameter: 9mm; Length: 20mm
✅ Thread: M3; Top-tight rigid coupling for high torque
✅ Pack: 12 x couplings, 2 x Allen wrenches, 48 x screws
💡 What is a shaft coupling used for in hobby robotics and RC builds? This handy connector transfers torque between shafts while keeping alignment and reducing vibration. - Connects two shafts with matching or different diameters for small drive systems - Maintains alignment in RC models, planes, boats, and robotics - Brass construction offers corrosion resistance and maintenance-free life