Hex Bit Wera 842/1 5 mm, alloy tool steel, hardness D 6.3

Hex bit Wera 842/1 5 mm is a single 5 mm hex insert manufactured from alloy tool steel with a specified hardness of D 6.3. Intended for use with compatible bit holders and screwdrivers, this bit delivers accurate engagement with hex fasteners for assembly, maintenance and repair tasks. Its compact form and durable material ensure repeatable performance and reliable torque transfer in both professional and DIY environments.

Advantages

The alloy tool steel construction provides enhanced wear resistance and a consistent contact profile that reduces cam-out. A hardness rating of D 6.3 balances toughness and edge retention to maintain shape during repeated use. The bit's precise machining ensures snug fit in hex sockets and minimizes play, improving control when tightening or loosening fasteners.

Suitable for

• Assembly of machinery and equipment requiring 5 mm hex fasteners
• Maintenance and repair tasks in workshops and service vehicles
• DIY projects involving furniture, bicycles, or appliances with hex screws
• Use with bit holders, ratchet adapters and compatible multi-bit screwdrivers

Key specifications

• Bit type: hex (6-sided)
• Size: 5 mm
• Material: alloy tool steel
• Hardness: D 6.3
• Design: compact insert for bit holders and screwdrivers

How to use

Insert the 5 mm hex bit into a compatible bit holder, chuck or screwdriver drive until it seats securely. Align the bit with the hex fastener and apply steady torque, ensuring the bit remains engaged with the fastener profile to prevent rounding. For powered drivers, select a moderate speed and controlled torque setting to avoid overstressing the bit or fastener. Remove the bit by pulling or releasing the holder's retention mechanism as designed.

Usage recommendations

Store the bit in a clean, dry toolbox or organizer to prevent corrosion and damage. Inspect the bit tip regularly for wear or deformation and replace it when signs of rounding or chipping appear. Use appropriate torque settings and matching bit holders to maximize service life and maintain fastening accuracy.