Hirobo HI2509012 Parallel Pin 2 x 11.6 - Parallel Pin for RC Helicopter Linkages  [HI2509012]

Parallel pin for helicopter linkages

This is an RC-scale parallel pin listed as HIROBO 2509-012 and referenced by model HI2509012, presented as a spare pin intended for general helicopter parts and repairs. The product name specifies the pin size as "2 x 11.6", which is the primary technical identifier to match against your parts list or drawings.

Functionally the pin serves as a simple mechanical locator in linkage assemblies and small pivot points on helicopter rotor systems. It is intended to replace worn or lost pins of the same "2 x 11.6" specification and restore correct geometry where parallel pins are used.

Installation is straightforward on RC models: align the linkage or bracket hole with the pin, slide the pin into position, and secure it using the original retainer or clip design from your model. Verify lateral play and rotor tracking after replacement, and use standard workshop checks rather than forcing mismatched components into place.

For tuning and maintenance the pin's role is limited but important: correct pin selection helps maintain linkage geometry, which affects cyclic and tail response. When swapping pins during setup, confirm cleanliness of mating holes and check for signs of wear that could indicate the need for adjacent part replacement.