Hirobo HI2525013 M2 D3.5 Radius Replacement Pin  [HI2525013]

Durable D3.5 Radius Pin for M2

The Hirobo HI2525013 D3.5 radius pin is supplied as an RC-scale replacement for M2-compatible linkages and small pivot points on model helicopters and similar assemblies. It is intended to keep linkage geometry accurate and provide a compact pivot interface where a D3.5 radius is required.

For installation, remove the worn pin, verify the M2 thread or bore is the correct fit, then press or slide the replacement into place until properly seated. Check for free rotation and ensure there is sufficient clearance before refitting adjacent components. Typical hobby hand tools will be sufficient for these maintenance tasks.

From an inspection perspective, this pin helps maintain reliable pivot action over time when correctly fitted. Replace like-for-like when the original part specifies a D3.5 radius pin for M2 fittings, and perform routine checks to spot early wear or looseness.