Futaba FUSHORN-B Standard Servo Horn Type-B Six-Arm D6mm 4pcs (w/o screw)  [FUSHORN-B]

Standard six‑arm servo horn

This Futaba FUSHORN-B six-arm servo horn is an RC-scale accessory designed to provide multiple arm positions for precise servo linkage setup. The Type-B pattern with a D6mm spline interface matches Futaba standard servo splines and gives you finer mechanical leverage options without altering the servo itself.

The pack contains 4 pcs of identical six‑arm horns, sold without mounting screws. Each arm offers a distinct throw radius so you can change linkage geometry quickly during tuning. Because this is a dedicated servo accessory, use matched screws and hardware sized for your servo case to avoid damaging the spline or horn.

Installation is straightforward: remove the servo horn screw, align the D6mm spline on the horn with the servo output shaft, set the servo to neutral, then secure the screw (not included) while holding the horn in the desired orientation. Verify travel endpoints and trim in your transmitter before final tightening to prevent binding.

On tuning: choose a longer arm for increased throw at the expense of torque feel, or a shorter arm to reduce travel and increase apparent torque for finer control. The multiple arm positions make quick ratio changes possible during on‑track or bench testing without swapping hardware.