Socket 3/4" 21mm 6-point, impact, JCB JCB-46521

Impact socket for 3/4" drive with a 21 mm opening and a 6-point profile, model by JCB. This socket is designed for heavy-duty use with impact wrenches and compatible pneumatic or electric torque tools. The 6-point geometry ensures concentrated contact with fastener flats to reduce slippage and rounding while transferring high torque efficiently for automotive, agricultural and construction maintenance tasks.

Advantages

The 6-point profile provides a secure, non-slip engagement on hex fasteners and reduces the risk of rounding. Constructed for impact applications, the socket resists fracturing and deformation under repeated high-torque cycles. Its 3/4" drive is compatible with standard impact tools, allowing quick attachment and reliable torque transfer. The 21 mm opening matches common metric fasteners found in vehicle, machinery and equipment maintenance.

Suitable for

• Removing and tightening metric hex bolts and nuts with 21 mm heads
• Use with impact wrenches, pneumatic and electric torque tools
• Automotive repair, tyre and suspension work
• Agricultural machinery maintenance
• Construction and heavy equipment service tasks

Key specifications

• Drive size: 3/4" suitable for impact tool square drives
• Socket opening: 21 mm
• Profile: 6-point (hex) for secure fastener contact
• Application type: impact-rated for use with impact wrenches
• Material and finish: impact-grade steel construction (designed for durability)

How to use

Select the socket to match the 21 mm fastener head and attach it securely to a 3/4" drive impact wrench or breaker bar. Ensure the tool and socket are rated for impact use before operation. Place the socket squarely on the fastener, apply controlled torque with the impact tool, and avoid side loading to prevent premature wear. After use, inspect the socket for cracks or deformation and store in a dry toolbox or socket rail to maintain condition.

Usage recommendations

Use only with impact-rated extensions and adapters, and avoid using impact sockets on manual hand ratchets that exceed their drive rating. Regularly inspect the socket for signs of wear or damage and replace if any cracking, rounding or significant deformation is observed.