Hirobo HI2509021 Needle Pin 1.5 x 7.8mm Needle Pin for RC Models  [HI2509021]

Needle pin for RC linkages

This Hirobo HI2509021 needle pin is an RC-scale replacement pin sized 1.5 x 7.8mm intended for small linkage and retention duties on model helicopters and other RC assemblies. The part functions as a simple locating and retention element where a slender, press-fit or through-hole pin is required to hold clevises, linkage arms, or similar small components in alignment.

Use and installation focus on fit and alignment rather than torque: verify bore clearance, remove any burrs, and ensure the pin seats fully without lateral play. During setup and tuning, these pins act as low-profile anchor points that keep linkage geometry stable while allowing intended rotational movement at the joint.

Inspect pins regularly for wear or deformation and replace if any bending or significant surface wear appears, as a worn pin can introduce slop into control linkages and affect trim and responsiveness.