Socket bit 3/4" 21 mm Honiton H1621 — 6-point drive

Honiton H1621 is a 6-point socket bit with a 3/4" square drive and a 21 mm hex profile. It is designed for fastening and loosening hex fasteners where a secure engagement and high torque transmission are needed. The socket bit is compatible with tools that accept a 3/4" drive and is intended for professional and hobby workshop environments, including automotive and industrial applications.

Advantages

The 6-point geometry reduces rounding of hex fasteners by providing full-face contact on the flats. The 3/4" drive ensures compatibility with heavy-duty ratchets, torque wrenches and impact adapters capable of transmitting high torque. The 21 mm size covers a common range of bolts and nuts used in vehicle repair and machinery maintenance. The construction and fit are intended to provide reliable engagement and durability during repeated use.

Suitable for

• Automotive repair and maintenance
• Industrial machinery assembly and servicing
• Workshop and garage general fastening tasks
• Heavy-duty bolting where high torque is required

Key specifications

• Drive size: 3/4" square drive compatible
• Socket profile: 6-point (hex)
• Socket size: 21 mm
• Intended use: fastening and loosening hex fasteners
• Typical applications: automotive, industrial, workshop

How to use

Select a compatible 3/4" drive ratchet, breaker bar, torque wrench or impact adapter, and fit the socket onto the tool's square drive until it locks. Place the 21 mm 6-point socket fully onto the fastener, ensuring full engagement on opposing flats before applying torque. For removal, apply force in the appropriate rotation while maintaining alignment to avoid slippage. For installation, set the torque tool to the required specification and tighten according to fastener manufacturer recommendations.

Usage recommendations

Use the socket only with tools rated for 3/4" drives and appropriate torque values. Inspect the socket and fastener for wear or damage before use. Avoid using damaged sockets or applying excessive force beyond tool or fastener limits. For impact applications, verify that the socket and tool are rated for impact use; when using with torque wrenches, follow the specified torque limits for the fastener and tool.