Hex key (Allen key) STAHLWILLE long 5 mm, model 43213005

STAHLWILLE long 5 mm hex key (model 43213005) is a manually operated Allen key designed for accessing hexagonal socket screws in deep or confined spaces. The longer arm provides extended reach and improved leverage compared with standard keys, making it suitable for tasks that require insertion into recessed fittings or around obstructions. The tool is intended for mechanical, automotive and industrial maintenance where a precise 5 mm hex drive is required.

Advantages

The long arm design delivers greater reach while maintaining torsional strength for manual tightening and loosening of 5 mm hex fasteners. Solid construction and precision-formed hex profiles ensure accurate fit in sockets, reducing rounding of screw heads. Its straight long form facilitates access into narrow assemblies and gives the operator better control when working in restricted areas.

Suitable for

• Reaching hex socket screws recessed in assemblies or housings
• Manual assembly and disassembly tasks in mechanical and automotive environments
• Maintenance and repair work where a 5 mm hex drive is required
• Working in confined or obstructed spaces where a longer reach is needed

Key specifications

• Tool type: long hex key (Allen key)
• Drive size: 5 mm
• Form: long arm for extended reach
• Operation: manual hand tool
• Material and finish: precision-formed metal construction for strength and wear resistance

How to use

Select the hex key by confirming the 5 mm hex fits squarely into the screw socket. Insert the long arm into the hexagonal recess until fully engaged, ensuring the profile seats correctly to minimize cam-out. Apply controlled manual force using the long arm for leverage; for tightening, turn clockwise, and for loosening, turn counterclockwise. When working in confined spaces, position the body and wrist to keep force aligned with the axis of the screw to avoid slippage or rounding.

Usage recommendations

Use the long 5 mm hex key for manual operations only; avoid using with impact tools or applying excessive torque beyond hand force to prevent tool or fastener damage. Inspect the key and the hex socket for wear before use and replace the tool if the hex profile shows deformation or rounding.