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

Horn lock screw details

This Futaba FU0A08401 M3x8mm servo horn lock screw is a single replacement fastening for the metal gear servos listed in the compatibility group. It locks the servo horn to the spline to prevent slippage under load, helping to preserve steering and control surface precision on RC models.

Compatibility is restricted to the specified models: BLS275SV, 571SV, 371SV, S9373SV; confirm your servo uses the matching spline and horn before fitting. The part is supplied as 1 pcs for easy replacement during routine servicing or when fitting a horn with different throw or geometry.

Installation tip: insert the M3x8mm screw through the horn spline and tighten with the correct hex driver until secure, taking care not to over-torque which can damage the spline or horn. After initial installation check for any play and re-tighten if required during the first run-in.