Hirobo HI2511021 Precision Cross Member M3 x 105  [HI2511021]

Precision alignment cross member for airframes

This cross member is an RC helicopter structural part meant to align and stabilise mounting points and subframes. The M3 x 105 marking indicates the fastener standard and the component length where M3 hardware is used.

In practice the bar preserves correct geometry during builds and repairs, helping to limit wear on bearings and transmission assemblies by keeping components in line. Use it as a replacement piece when restoring drivetrain or rotor alignment after maintenance.

Installation notes: secure with the appropriate M3 fasteners to the factory mounting holes, ensure mating threads are in sound condition, and verify static alignment before any test flights. Avoid excessive torque and recheck tightness after initial testing.