This Hirobo HI2511003 cross member is supplied as an RC replacement piece for general helicopter frames and assemblies. The M3 x 26 dimension specifies the thread diameter and length designed for standard M3 fasteners used across many helicopter designs.
Install this cross link when a rigid connection is needed to preserve alignment between mounts or to fasten small linkage setups. It provides a simple structural function that helps keep the aircraft's geometry stable for tuning.
Fitting notes: position the cross member into the existing mount holes, use the correct M3 fasteners with suitable thread engagement for your chassis, and tighten carefully to avoid stripping threads in delicate parts. This is a passive component, not a moving linkage.
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