Hirobo HI2509011 Needle Pin 4 x 15.8 for RC helicopter linkage and small assembly retention  [HI2509011]

Needle Pin 4 x 15.8

This Hirobo HI2509011 needle pin is an RC-scale accessory sized 4 x 15.8 intended for use in helicopter assemblies where compact pivot and retention pins are required. It serves as a simple mechanical fastener for small shafts, linkages and sub-assemblies common to model helicopter maintenance and repair.

Installation is straightforward: align the mating holes on the linkage or control arm, insert the needle pin through the shaft or hole, and complete the retention with the appropriate clip or securing method used on your model. The part is designed to be a replaceable item for routine service and trim adjustments, not a structural upgrade.

In setup and tuning, a needle pin like this provides a stable pivot point for control links and small rotating parts, helping maintain consistent geometry during tail and cyclic adjustments. Keep spare pins on hand for quick swaps during field maintenance.