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

Compact retention pin for model linkages

The Hirobo HI2509021 is a 1.5 x 7.8mm needle pin intended as a small-scale replacement for linkage retention on helicopters and other RC models. It is intended to keep clevises and small arms aligned without adding bulk.

Fitment is primarily about clearance and seating: deburr the bore, confirm the pin slides in without tight friction, and make sure it does not allow lateral movement. These pins act as discreet anchor points that preserve intended joint rotation while stabilising control geometry during setup and flying.

Monitor pins for corrosion or surface fatigue and replace them if bending or significant wear is present, because worn pins will let linkages develop play and degrade handling precision.