Spline socket bit 1/2" drive M6 x 100 mm long — Proxxon PR23370

Proxxon PR23370 is a long spline socket bit with a 1/2" drive, sized M6 x 100 mm. It is designed to engage M6 spline fasteners where access is limited or where a standard-length bit cannot reach. The extended 100 mm length provides additional reach for recessed or tightly packed assemblies while the spline profile ensures multi-lobe contact for torque distribution and reduced rounding of fastener heads.

Advantages

The long spline socket bit offers precise fit to M6 spline heads, improved torque transfer compared with some hex designs, and reduced risk of cam-out. Its 1/2" drive makes it compatible with common ratchets and torque tools used in automotive and workshop environments. The extended length allows access to deep-set fasteners without the need for extensions or adapters in many situations.

Suitable for

• Automotive repair and maintenance in confined engine or chassis areas
• Mechanical assembly and disassembly of machinery with recessed M6 spline fasteners
• Workshop tasks requiring precise torque application with a 1/2" drive
• Maintenance work on equipment with limited access to fastener heads

Key specifications

• Drive size: 1/2" compatible with standard 1/2" ratchets and torque wrenches
• Bit profile: spline for M6 fasteners providing multi-lobe engagement
• Length: 100 mm overall length for extended reach
• Intended application: external use with hand or torque tools for fastening and loosening

How to use

Select a compatible 1/2" ratchet or torque wrench and firmly attach the spline socket bit into the square drive. Position the spline profile fully onto the M6 fastener head to ensure correct engagement. Apply steady torque in the required direction, taking care to use the appropriate torque setting when using torque-controlled tools. After use, inspect the spline contact surfaces for wear and store the bit in a dry, protected location.

Usage recommendations

Use the spline socket bit with torque-limited tools when working on components that require specified torque values. Avoid using damaged or excessively worn bits to prevent damage to spline fasteners. Clean and lightly lubricate the drive connection occasionally to maintain reliable engagement and prolong the service life of the tool.