Hirobo HI2539015 guide pin M3 x 6.3  [HI2539015]

Guide pin for small helicopter parts

This guide pin is an RC-scale accessory intended for alignment and locating duties in small helicopter assemblies. The identification M3 x 6.3 denotes the nominal diameter and length that installers reference when matching to mating holes or threaded features.

Use this pin where a compact guide or locator is required to hold components in position during assembly or maintenance. It is most often applied in linkage blocks, frame alignment points, and other small-scale helicopter subassemblies that accept an M3-sized pin.

Installation and set-up notes: verify the receiving bore or threaded hole matches an M3 interface and confirm the required depth for a 6.3mm pin, align mating parts before securing, and check for free rotation where applicable. This description refers specifically to a model-scale RC accessory and not to full-size aircraft components.