Futaba FUSHORN-D Small-Circle Type-D D6mm Servo Horn, Pack of 4 (without screw)  [FUSHORN-D]

Compatibility Notes for Futaba Servos

The Futaba FUSHORN-D Type-D small-circle horn is offered as a 4-piece replacement set without screws and is intended for use with standard Futaba servos. Its D6mm small-circle bore is designed to align with the typical output spline and mounting approach used on many Futaba-standard units, but users should confirm fit with their specific servo or adaptor.

Installation notes: place the servo at neutral before attaching the horn, position the small-circle hole over the servo spline or any adaptor being used, and secure using an appropriate screw or fastener (not supplied). Once mounted, run the servo through its full travel to check for smooth operation and correct linkage geometry; re-centre if any offset appears.

Practical use: switching horn profiles alters lever arm and mechanical advantage. The compact D6mm Type-D reduces lever arm for faster actuation but lowers torque and throw; larger horns increase movement and force. Match the FUSHORN-D to your linkage layout and desired control response.