Two Pack Universal Joint Couplings for RC Boats and Cars Beefy 3 Section U Joint Shaft Coupler 4mm 5mm 6mm Fits 12mm Outer Diameter 52mm Length Durable Metal DIY Robotics

Two-Pack Metal U Joint Couplers for RC Hobbyists
✔️ Two-pack universal joint couplers, 12mm OD, 52mm long

These 3-section U joint couplers are built from durable metal and designed to mate with drive shafts in RC cars, boats, and robotics projects. This two-pack includes 2 joints and 8 set screws for quick DIY repairs.

✅ Universal Joint Outside Diameter: 12mm
✅ Length: 52mm
✅ Hole Diameter options: 4mm, 5mm, 6mm
✅ Material: Metal (Silver), durable
✅ Fastening Screw Size: M3
✅ Weight: 60g for 2 pieces

💡 What is a universal joint coupler used for in RC cars and boats?
- handy for transferring power between misaligned shafts
- supports 4mm, 5mm, 6mm shaft sizes with set screws
- compact metal design ideal for DIY robotics