Hex Key (Allen Wrench) Bondhus 6.0 mm — length 139 mm

Bondhus 6.0 mm hex key (Allen wrench) with a length of 139 mm is a solid, manually operated tool designed to drive 6 mm internal hex fasteners. The straight-shank geometry and precise machining deliver a tight fit in hex sockets to reduce fastener rounding. The 139 mm length provides extra reach for accessing recessed or hard-to-reach fasteners while remaining compact enough for workshop and field use.

Advantages

This Bondhus hex key offers a precise fit that minimizes wear on both tool and fastener, helping to preserve hex socket integrity during repeated use. The solid construction and accurate hex profile ensure reliable torque transfer for assembly, maintenance and repair tasks. Its 139 mm length improves access to deep-set fasteners without sacrificing control for manual operation.

Suitable for

• Assembly and disassembly of mechanical components with 6 mm internal hex screws
• Furniture assembly and adjustment where deeper reach is required
• Bicycle maintenance and component repairs involving 6 mm hex fasteners
• General workshop maintenance and light industrial repair work

Key specifications

• Hex size: 6.0 mm
• Overall length: 139 mm
• Tool type: straight hex key (Allen wrench) for manual use
• Material and finish: hardened machined steel (precision-ground hex profile)
• Drive style: internal hex (female) engagement

How to use

Insert the hex key fully into the internal hex socket of the fastener to ensure maximum contact between the tool and the fastener walls. Apply steady manual torque, keeping the key aligned with the fastener axis to avoid cam-out or rounding. Use the longer length to reach recessed fasteners and handle with two hands if additional control is needed. Inspect both tool and fastener for damage before use and avoid applying excessive force beyond the fastener or tool ratings.

Usage recommendations

For best results, keep the hex faces free of dirt and burrs and use the correct 6.0 mm size rather than force-fitting a different size. When higher torque is required, consider using the longer arm for increased leverage while maintaining alignment. Store the tool in a dry place to prevent corrosion and periodically inspect the hex profile for wear.