HH8D Hex Key Head, 8D, 6mm

Tohnichi HH8D is a precision hex bit holder head designed as an interchangeable accessory for torque wrenches, enabling accurate tightening using 1/4" hex drive bits for hexagon socket head cap screws in restricted access areas across electronics manufacturing, precision assembly, and small-scale engineering tasks. Featuring a compact 8D (8 mm diameter round end) for seamless integration and a 1/4" female hex socket for bit insertion, this head delivers reliable torque transfer without slippage, compatible with select Tohnichi CL, CSP, CSF, CDB, and CEM series wrenches equipped with 8D 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: 8 mm Round End (8D insertion angle)
• Head Type: Hex bit holder (1/4" female hex, 6.35 mm width across flats)
• Bit Engagement: Direct insertion for 1/4" hex drive bits; single-direction torque application
• Head Width: 12 mm (across flats)
• Compatibility: Tohnichi CL10N, CSP6N, CSF7N, CL2N, CL1.5N, CSP1.5N, CL3N, CSP3N, CDB7N-S, CDB14N-S, CEM10N3, and other 8D-equipped interchangeable head torque wrenches
• Torque Capacity: Up to 15 N·m (head allowable; typically 1 - 15 N·m depending on wrench model)

Physical and Environmental Specifications

• Weight: 0.09 lbs (0.04 kg)
• Dimensions: 1.38" L x 0.47" W x 0.57" H (35 mm x 12 mm x 14.5 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

• 1/4" Hex Bit Accommodation: Securely holds standard 1/4" hex drive bits for versatile selection and straightforward engagement with socket head cap screws, enabling precise control in narrow clearances without slippage
• Compact 8D Interface: Secure round-end design locks firmly into compatible wrench bases, allowing quick swaps for adaptable bit handling and reduced setup time
• Low-Profile Build: Slim 14.5 mm thickness and 12 mm width minimize obstruction in tight spots, ideal for precision assembly lines and maintenance in confined electronics
• Durable Alloy Construction: Hardened steel withstands high-cycle use and minor impacts, promoting longevity and reliability in demanding low-torque environments
• Versatile Compatibility: Effortlessly pairs with multiple Tohnichi wrench models for broad application coverage, from ultra-low-torque micro-fastening to light-duty mechanical tasks