Socket 1/2" 27 mm GEKO T00143-27 hexagon (12-point) for hand tools, 27mm

GEKO T00143-27 is a 1/2" drive, 27 mm 12-point (double hexagon) socket designed for use with hand ratchets and torque tools. It provides full-face contact on 12-point bolt heads and nuts and is intended for tightening and loosening fasteners in automotive and mechanical maintenance tasks. The compact profile allows access in confined spaces while maintaining compatibility with standard 1/2" drives.

Advantages

The 12-point geometry permits engagement with fasteners in more indexed positions than a 6-point socket, enabling quicker alignment in tight areas. The 27 mm size covers common nut and bolt dimensions found on engines, suspension components and general machinery. Its 1/2" drive interface ensures secure attachment to hand ratchets and torque wrenches, and the compact length improves access to recessed fasteners without sacrificing drive strength.

Suitable for

• Automotive repair and maintenance
• Engine and transmission work
• Suspension and brake system servicing
• General mechanical assembly and disassembly
• Work in confined or recessed spaces

Key specifications

• Drive size: 1/2 inch
• Socket size: 27 mm
• Point configuration: 12-point (double hexagon)
• Connection type: square drive for hand ratchets and torque wrenches
• Application: tightening and loosening hexagonal fasteners
• Design: compact profile for restricted access

How to use

Select the 27 mm socket for the matching fastener and fit it onto a compatible 1/2" drive ratchet or torque wrench. Ensure the socket fully seats on the bolt head or nut to achieve full-face contact with the 12-point geometry. Apply torque smoothly and avoid sudden impacts when using with hand tools; when precise torque values are required, use a calibrated torque wrench and follow the fastener manufacturer's torque specifications. After use, inspect the socket for wear or rounding and store in a dry toolbox to prevent corrosion.

Usage recommendations

Use the 12-point socket when you need faster alignment in tight spaces or when access prevents a full rotation for a 6-point socket. For high torque applications on rounded or damaged fasteners, consider switching to a 6-point socket to reduce the risk of further rounding. Keep the socket clean and avoid excessive side loading to prolong service life.