Hirobo HI2509006 Needle Pin 3 x 21.8 for RC Helicopter Assemblies  [HI2509006]

Retention pin for RC helicopter components

The Hirobo HI2509006 is a 3 x 21.8 needle pin supplied for use in model helicopter assemblies where a precision retention pin of this dimension is required. It functions as a small mechanical fastener to keep linkage ends, brackets, and similar small parts aligned and retained during operation.

Installation notes: verify receiver hole diameter and tolerance before insertion, make sure the pin sits flush without binding, and fit any necessary retainers such as circlips or grub screws as appropriate. Avoid forcing pins into undersized bores to prevent distortion.

Tuning and care: monitor the pin for straightness and surface condition after use, especially where control precision matters. Remove and replace pins that show wear or bending instead of trying to reform them.