Hirobo HI2509022 1.5 x 5.8 tuning needle pin  [HI2509022]

Needle pin designed for tighter control response

This needle pin is a small replacement component intended for precision control linkages and shaft stops on model helicopters and related RC models. Identified by the Hirobo HI2509022 code and sized at 1.5 x 5.8, it fills the role where a narrow locating pin is needed to secure link arms or retain compact parts.

Functionally the pin acts as a locator to cut down lateral play at pivots and connection points. Correct installation into a matching hole helps keep control geometry consistent and contributes to cleaner servo-to-control response during fine tuning.

Practical tips: check the receiving hole for a snug fit with the 1.5 mm nominal diameter and ensure the 5.8 mm length gives sufficient engagement. Insert straight to avoid deformation, and replace the pin if wear reduces its clearance control.