Futaba FU0A08401 M3x8mm Servo Horn Lock Screw, 1 pcs  [FU0A08401]

Lock screw for precise control

The Futaba FU0A08401 M3x8mm servo horn lock screw serves as a direct replacement for the metal gear servos specified in the compatibility list. It fastens the horn to the spline to prevent rotation under load, preserving accurate steering and control surface movement on RC vehicles and aircraft.

Compatibility is limited to the models shown: BLS275SV, 571SV, 371SV, S9373SV; ensure your horn matches the servo spline prior to fitting. The product is supplied as 1 pcs to allow simple replacement when the original screw is lost or when changing horn configurations.

Fitting guidance: drive the M3x8mm screw into the horn spline using the correct hex driver and tighten until the horn is secure. Do not over-torque as this can damage the spline or strip the threads. After the first runs, re-check tightness and adjust if any movement is detected.