Socket insert 1/4" Wera 8790 HMA 05003516001 External hex 6.3 mm

Wera Socket insert 1/4" 8790 HMA is a compact external hex insert designed for use with 1/4" drive tools. The 6.3 mm hex interface provides a secure fit on hex fasteners and transfers torque reliably when used with ratchets, bit holders or extension adapters. Constructed from hardened tool steel and finished for corrosion resistance, this insert is intended for routine maintenance, assembly and repair work where a small, precise socket interface is required.

Advantages

The 6.3 mm external hex geometry ensures precise engagement with hex fasteners to reduce rounding and slipping. Its compact 1/4" drive format makes it compatible with a wide range of hand tools and accessory systems, allowing quick changeover between bits and sockets. Durable materials and a protective finish extend service life under normal workshop conditions while maintaining consistent torque transmission.

Suitable for

• General maintenance and repair of machinery and equipment
• Assembly tasks in workshops and production lines
• Automotive and bicycle repair requiring small hex sockets
• Use with 1/4" ratchets, bit holders and extension bars

Key specifications

• Drive size: 1/4" (6.3 mm)
• Head type: external hex
• Hex size: 6.3 mm
• Material: hardened tool steel
• Finish: corrosion-resistant surface treatment
• Compatibility: designed for standard 1/4" drive accessories

How to use

Select the Wera 1/4" socket insert and attach it to a compatible 1/4" drive ratchet, bit holder or extension. Ensure the insert is fully seated in the tool and that the hex end fits snugly over the fastener. Apply steady torque appropriate to the fastener size and material, avoiding excessive force that could damage the fastener or the insert. After use, clean debris from the insert and store it in a tool organizer to protect the driving faces.

Usage recommendations

Use the insert with tools rated for 1/4" drive and avoid impact tools unless the insert is specifically rated for impact use. Regularly inspect for wear or rounding of the hex profile and replace if fit becomes loose to maintain safe and reliable fastening.