Hirobo HI2509006 Needle Pin 3 x 21.8 — Helicopter needle pin for general assemblies  [HI2509006]

Needle pin for helicopter assemblies

This Hirobo needle pin is an RC-scale retention pin sized 3 x 21.8 intended for use in helicopter component assemblies where a needle pin of this dimension is specified. It serves as a small mechanical fastener to locate and retain linkage ends, brackets, or other small fitted parts in place during operation.

Installation notes: confirm the mating hole diameter and fit tolerance before assembly, ensure the pin seats fully without binding, and secure with the correct retaining method used in the assembly (e.g., circlip or set screw where applicable). Avoid forcing oversized pins into undersized bores to prevent deformation.

Tuning and maintenance: inspect the pin regularly for wear, bending, or surface damage after use, especially in control linkages where play affects flight control. Replace pins that show visible wear rather than attempting to reform or reuse compromised components.