HIROBO HI2539017 Hexagon Button Bolt M3 x 6 - Screw for RC Helicopter General Parts  [HI2539017]

Hexagon button bolt for RC helicopters

This is an RC-scale hexagon button bolt identified as HIROBO HI2539017 and sized M3 x 6, intended for use in helicopter general parts and other small model assemblies. It is a button-head hex fastener designed to secure lightweight structural components where a low-profile head is preferred.

Installation notes: fit the bolt with the appropriate hex driver and avoid overtightening to prevent thread damage in aluminium or plastic mounts. The bolt is used where a neat head profile and reliable clamping are required, for example attaching frame plates, servo braces, or non-load-bearing brackets in model helicopters.

Tuning and maintenance: keep spare bolts in your maintenance kit and check fastener tightness after flights; replace any fastener that shows stripped threads or head deformation. For repeatable results, install with steady hand torque and thread-locker only where parts require permanent retention.