Hirobo HI2539031 Hexagon Button Bolt M3 x 5 Pack of 10 for RC Helicopter Use  [HI2539031]

Hirobo M3 x 5 Button Head Bolts — 10 Pack

This replacement pack contains 10 pcs of Hirobo hexagon button bolts sized M3 x 5, intended for RC-scale helicopter and model repairs where a low-profile, rounded-head fastener is required. The bolts act as general-purpose fasteners for frames, linkages, mounts, and assembly points that accept M3 hardware.

Installation notes: use an appropriate hex driver sized for M3 button heads, apply controlled torque, and avoid overtightening into plastic or thin alloy parts to prevent thread damage. In vibration-prone assemblies, consider threadlocker or lock washers matched to the component material.

Tuning and maintenance role: the compact button-head profile reduces interference with moving parts and linkages, making these bolts useful in tight-clearance areas commonly found in RC helicopter frames and general parts maintenance tasks.