SH12D-4X12N Notched Open End Head, 12D, 12mm

Tohnichi SH12D-4X12N is a precision quadruple-notched open end head designed as an interchangeable accessory for torque wrenches, facilitating accurate tightening of slotted or multi-notched hex fasteners 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 a 12 mm quadruple-notched open end for superior multi-angle fastener engagement, this head delivers reliable torque transfer without slippage, 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: Quadruple-notched open end (12 mm across flats)
• Notched Engagement: Direct multi-angle grip for 12 mm slotted/multi-notched hex fasteners; single-direction torque application
• Head Width: 19.5 mm (outside across flats)
• Compatibility: Tohnichi CTA50N, CTB50N, CL50N, YCL40N2, CSP50N, CEM50N3, and other 12D-equipped interchangeable head torque wrenches
• Torque Capacity: Up to 50 N·m (head allowable; typically 20 - 50 N·m depending on wrench model)

Physical and Environmental Specifications

• Weight: 0.16 lbs (0.073 kg)
• Dimensions: 2.09" L x 0.77" W x 0.35" H (53 mm x 19.5 mm x 9 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

• Quadruple-Notched Open End Grip: Four precision notches offer exceptional versatility and multi-sided engagement for slotted or multi-notched hex fasteners, ensuring optimal axis alignment and preventing wobbling for superior precision 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 9 mm thickness and 19.5 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 low-torque electronics to medium-duty mechanical fastening
• Drop-Prevention Design: Aligned axis configuration safeguards against accidental head detachment during operation, enhancing safety and tool integrity