The Hirobo needle pin HI2509002 is an RC replacement pin intended for helicopter linkage joints where a straight, compact pin is required to retain control rods and ball-link assemblies. The size notation clarifies the nominal dimensions for fit checks against your existing parts.
Fitting is straightforward: position the linkage eye or rod in the mount hole, slide the pin through the mating parts, and secure it with the model's clip or retainer. The pin provides a simple pivot that helps keep linkages aligned while you trim and tune the model.
During tuning or regular maintenance, replace the pin if you detect play at pivot points—fresh hardware helps preserve precise servo response. Always confirm the 2 x 8.8 sizing is compatible with your helicopter's linkage hardware before extended use.
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