Hirobo HI2539031 Hexagon Button Bolt M3x5 10-Pack for RC Helicopter Repairs  [HI2539031]

Ten M3 x 5 Hex Button Bolts

This replacement pack contains ten Hirobo M3 x 5 hexagon button bolts, suitable for a range of RC model repairs where a low-profile, rounded head is required. They are commonly used on frames, mounts, linkages, and other locations that accept M3 hardware.

Fitting advice: use the correct M3 hex driver, apply measured torque, and take care not to overtighten into softer plastics or thin alloy components to avoid thread damage. For high-vibration installations, use threadlocker or locking hardware suited to the assembly.

Practical tuning benefits: the button-head form factor minimises interference with moving parts and reduces the chance of snagging in tight spaces, which is helpful in compact helicopter layouts.