Hirobo HI2539023 Hexagon Button Bolt M3 x 4, Screw for RC Helicopter General Parts  [HI2539023]

Hexagon Button Bolt M3 x 4

This is an RC-scale hexagon button bolt offered under Hirobo HI2539023, intended for use in helicopter general parts and small-assembly fastening tasks. The part is identified by its M3 x 4 designation which denotes the thread size and length commonly used in model helicopters' structural and accessory joints.

Installation is straightforward: use an appropriately sized hex driver to seat the button head bolt without over-torquing, and check alignment of mating parts before final tightening. The bolt serves a tuning and maintenance role by allowing secure, low-profile connections for linkages, brackets, and small mounts within rotorcraft assemblies.

Note that compatibility depends on accepting M3 x 4 fasteners; confirm clearance and thread engagement on the target component before installation to ensure a reliable fit in your RC helicopter model.