Socket bit for ratchet YATO Hex 4.5 mm L25 mm Cr-V 1/4" YT-1402

Hex socket bit YATO Hex 4.5 mm L25 mm Cr-V 1/4" YT-1402 is a compact-purpose insert designed for use with 1/4" ratchets and bit holders. Manufactured from chrome-vanadium (Cr-V) steel, the bit provides a 4.5 mm across-flats contact for hex fasteners and a 25 mm overall length that facilitates access in confined spaces. The 1/4" drive interface ensures compatibility with common hand tools used in automotive repair, machinery maintenance, and assembly work.

Advantages

The Cr-V steel construction offers a balance of hardness and toughness for repeated torque application while resisting wear. The 4.5 mm hex profile gives precise engagement with matching fasteners, minimising slippage and rounding. Its 25 mm length combines reach and control, making the bit suitable for recessed or partially obstructed fastener locations. The 1/4" drive format makes it convenient to use with standard ratchets, drivers, and bit holders.

Suitable for

• Fastening and loosening 4.5 mm hex bolts and screws
• Automotive service and minor engine or interior repairs
• Maintenance of machinery and equipment with compact fastener locations
• Assembly tasks in workshops and production lines using 1/4" drivers
• Use with bit holders, extension adapters and compact ratchets

Key specifications

• Hex size: 4.5 mm across flats
• Length: 25 mm overall
• Material: Chrome-vanadium (Cr-V) steel
• Drive type: 1/4" (6.35 mm) square drive
• Intended use: Manual ratchet and bit-holder applications

How to use

Select a compatible 1/4" ratchet or bit holder and insert the socket bit until it seats securely in the drive. Place the hex tip onto the matching 4.5 mm fastener ensuring full engagement to reduce cam-out. Apply steady, controlled torque while turning the ratchet or driver; for tight or rusted fasteners consider applying penetrating lubricant and using short, incremental torque applications to avoid damaging the fastener head. After use, wipe the bit clean and store in a holder or case to prevent corrosion.

Usage recommendations

Use the bit within the recommended manual torque range for 4.5 mm hex fasteners and avoid excessive force from impact tools unless the bit is specifically rated for impact use. Regularly inspect the hex tip for wear and replace the bit when rounding or deformation is visible. Keep the bit dry and lightly oiled for long-term storage.