HH12DX8 Hex Key Head, 12D, 8mm

Tohnichi HH12DX8 is a precision hex key head designed as an interchangeable accessory for torque wrenches, facilitating accurate tightening of hexagon socket head cap screws (Allen bolts) in restricted access areas across automotive assembly, electronics manufacturing, and precision engineering tasks. Featuring a compact 12D (12 mm diameter round end) for seamless integration and an 8 mm hex socket for direct Allen key insertion, this head delivers reliable torque transfer without the need for additional adapters, compatible with select Tohnichi CTA, CTB, CL, YCL, CSP, and CEM series wrenches equipped with 12D interfaces. Ergonomically lightweight with robust construction, it supports rapid head exchanges to optimize workflow efficiency, minimize downtime, and ensure consistent torque application in space-constrained operations.

Key Performance Specifications

• Drive Size: 12 mm Round End (12D insertion angle)
• Head Type: Hex socket (8 mm width across flats)
• Hex Engagement: Direct insertion for 8 mm Allen key; single-direction torque application
• Head Width: 15 mm (across flats)
• Compatibility: Tohnichi CTA50N, CTB50N, CL50N, YCL40N2, CSP50N, CEM50N3, and other 12D-equipped interchangeable head torque wrenches
• Torque Capacity: Up to wrench rating (typically 15 - 60 N·m depending on wrench model)

Physical and Environmental Specifications

• Weight: 0.2 lbs (0.09 kg)
• Dimensions: 2.09" L x 0.59" W x 0.39" H (53 mm x 15 mm x 10 mm)
• Material: High-strength alloy steel with hardened finish
• Operating Temperature: 14°F to 104°F (-10°C to 40°C); suitable for standard workshop conditions
• Storage Conditions: Dry environment to prevent corrosion; indefinite shelf life

Key Features

• Direct Hex Key Insertion: Accommodates an 8 mm Allen key for straightforward engagement with socket head cap screws, enabling precise control in narrow clearances without slippage
• Compact 12D Interface: Secure round-end design locks firmly into compatible wrench bases, allowing quick swaps for versatile fastener handling and reduced setup time
• Low-Profile Build: Slim 10 mm thickness and 15 mm width minimize obstruction in tight spots, ideal for assembly lines and maintenance in confined machinery
• Durable Alloy Construction: Hardened steel withstands high-cycle use and minor impacts, promoting longevity and reliability in demanding industrial environments
• Versatile Compatibility: Effortlessly pairs with multiple Tohnichi wrench models for broad application coverage, from medium-torque mechanical to heavy-duty fastening