Hirobo HI2509011 Needle Pin 4 x 15.8 for Helicopter Linkage Retention  [HI2509011]

Precision Needle Pin 4 x 15.8

This Hirobo HI2509011 needle pin is sized 4 x 15.8 and serves as a precise retention element for model helicopter assemblies where small pivots are required. It functions as a simple fastener for short shafts, control linkages and minor rotating parts commonly encountered during model maintenance.

To install, match the holes on the linkage or control arm, push the pin through the shaft or bore, and finish by fitting the appropriate retaining clip or securing device used on your aircraft. The part is designed for replacement during regular servicing and trim work, not as a load-bearing structural improvement.

When tuning, a correctly fitted needle pin offers a consistent pivot point for control links and small rotating components, helping maintain predictable geometry through tail and cyclic adjustments. Storing spare pins for scheduled maintenance helps minimize downtime.