Hirobo HI2511021 M3 x 105 Structural Shaft  [HI2511021]

Installation and torque guidance for Hirobo cross member

Designed as a structural connector for RC helicopter frames, this cross member links adjacent mounts to preserve positional accuracy. Its M3 x 105 specification refers to the fastener pitch and part length where M3 hardware is standard.

When fitted, the component helps maintain straightness between subframes and reduces misalignment that can lead to increased wear on bearings and drive components. Treat it as a service replacement to restore correct geometry after maintenance or minor crashes.

Installation notes: fit with compatible M3 fasteners to the designated mounting points, make sure mating threads are clean, and start with light torque to verify alignment. Do not over-torque; recheck fastener security after initial bench testing.