Hirobo HI2531004 Set Screws M4 x 6 — 10 pcs for RC Helicopter Use  [HI2531004]

Replacement headless screws for helicopter components

This package contains ten M4 x 6 set screws marked HI2531004 from Hirobo, provided as spare fasteners for routine maintenance and small repairs on RC helicopters. The screws are headless M4 x 6 items designed for locations that require a compact, inset fastener.

Fitting guidance: select the matching hex driver and tighten incrementally to avoid thread stripping or damage to mating parts. Confirm the screw length and thread form are compatible with the receiving component before full tightening.

Usage note: these screws are intended for periodic upkeep, replacing lost hardware, and minor adjustments to linkages or mounts. Keeping spare pieces on hand reduces downtime during a session or club meet.