Hex Key (inch) Bondhus 5/64" — length 81 mm, ball end

Bondhus 5/64" inch hex key, 81 mm long with a ball end, is a solid, single-piece wrench designed to engage inch-sized socket-head fasteners with precise fit. The 81 mm overall length provides reach into recessed fasteners while the ball end allows turning at an angle when straight access is obstructed. This tool is intended for tasks requiring accurate engagement of 5/64" hex fasteners and reliable torque transfer in maintenance, assembly and repair work.

Advantages

The ball end design enables access to fasteners from an angle, improving reach and flexibility in confined spaces. Constructed as a solid hex key, it provides stable, consistent contact with the fastener and reduces the risk of rounding. The 81 mm length balances reach and control for tasks where both accessibility and leverage matter. The inch-size geometry ensures compatibility with 5/64" socket-head screws used in mechanical, bicycle and equipment applications.

Suitable for

• Maintenance and repair of mechanical equipment that use 5/64" hex fasteners
• Bicycle adjustments and component assembly requiring inch-sized hex drives
• Assembly of small machinery, instruments and fixtures with recessed socket-head screws
• Servicing electronics enclosures and panels where angled access is needed

Key specifications

• Size: 5/64 inch hex
• Overall length: 81 mm
• End type: ball end for angled access
• Construction: solid hex key (single-piece)
• Drive: inch-size geometry for socket-head fasteners

How to use

Insert the hex key into the 5/64" socket of the fastener until fully seated for optimal contact. Use the straight end for maximum torque when access is direct; use the ball end when an angle is required to reach recessed or obstructed screws. Apply steady, controlled force and avoid sudden impact to minimize wear on the fastener and tool. After use, wipe clean and store in a protective holder to maintain the hex geometry.

Usage recommendations

For best results, start turning the fastener with the straight engagement to confirm fit, then switch to the ball end only when necessary for clearance. Do not use the ball end to apply excessive torque beyond the ball tip’s intended angle, and avoid using the key as a pry bar or hammer. Periodically inspect the tip for deformation and replace the tool if the hex profile shows significant rounding.