Futaba FU0A08401 M3x8mm Servo Horn Lock Screw for Metal Gear Units, 1 pcs  [FU0A08401]

Secure horn connection

The Futaba FU0A08401 M3x8mm servo horn lock screw is intended as a replacement fastening for the metal gear servos listed in the compatibility group. It secures the horn on the spline so the horn resists slipping under load, helping to protect steering and control responses on RC models.

Only use with the specified servos: BLS275SV, 571SV, 371SV, S9373SV. Verify spline and horn compatibility before installation. The part is supplied as 1 pcs to make replacement simple when worn or when changing horn types for different travel or geometry.

Quick fitting tip: fit the M3x8mm screw into the horn spline and tighten using an appropriate hex driver until the horn is held firm. Avoid overtightening to prevent stripping or deforming the spline. Inspect and re-tighten after an initial run to confirm secure seating.