Hirobo HI2509022 needle pin 1.5 x 5.8 mm  [HI2509022]

Precision needle pin for linkages

This RC-scale needle pin is a compact replacement part intended for small control linkages and shaft stops on model helicopters and similar RC assemblies. The product is identified by the Hirobo HI2509022 designation and sized at 1.5 x 5.8, a profile commonly used where a slim-diameter locating pin is required to lock link arms or retain small components.

In practical terms the pin functions as a mechanical locator to minimise lateral play at pivots and connection points. When fitted into a correctly matched hole, it stabilises control link geometry and helps maintain consistent response from the linkage system during tuning and setup.

Installation notes: verify the hole diameter and depth match the 1.5 mm nominal diameter and 5.8 mm length, insert the pin cleanly to avoid bending, and inspect for wear or deformation before reuse. For linkage tuning, confirm there is no unwanted lateral movement after assembly and replace the pin if signs of wear appear.