Torque Adapter 4.0 Nm for 1/4 Inch Bits with Magnetic Bit Holder 6.35 mm - Bernstein 4-987
- This Item: €24.30
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Anyone tightening housing screws, assemblies, and medium-strength fasteners in electronics and equipment manufacturing to an exact torque value does not need a dedicated torque wrench: this adapter turns a standard 1/4 inch bit holding tool into a precise torque tool with a fixed preset value of 4.0 Nm.
Advantages
- Preset tightening torque of 4.0 Nm with a tolerance of ±10% for at least 20,000 clicks
- Clear click signal once the torque is reached, so the screw cannot be overtightened
- No torque release when loosening, giving up to 30% higher torque without an extra loosening tool
- Magnetic bit holder, 1/4 inch hexagon 6.35 mm to DIN 3126, for a secure bit fit
- Compact design with a 12 mm adapter diameter and an overall length of 38.3 mm
Technical Data
| Feature | Value |
|---|---|
| Tightening torque | 4.0 Nm / 40.8 Kgfcm / 35.4 in-lb |
| Tolerance | ±10% (from at least 20,000 clicks, factory certificate on request) |
| Bit holder | 1/4 inch hexagon 6.35 mm, magnetic (DIN 3126) |
| Drive | 1/4 inch hex shank 6.35 mm (DIN 3126) |
| Material | alloyed steel |
| Adapter diameter | 12 mm |
| Adapter length | 28.3 mm (without shank) |
| Overall length | 38.3 mm |
| Weight | 21 g |
Application
The adapter is used wherever an exact torque is required without a separate torque wrench, for example on housing screws, assemblies, and medium-strength fasteners in electronics and equipment manufacturing. Typical settings include quick-change systems, robotic stations, aerospace, medical technology, and any workbench in electronics manufacturing. The adapter is primarily intended for manual operation. When used with a power tool, a maximum speed of 100 rpm with minimal click repetition is recommended.
Standards and Delivery Data
- Tested to DIN EN ISO 6789 (manually operated torque screwdriving tools)
- Bit holder and drive to DIN 3126
- EAN 4250838529891
- Customs tariff number 82041100
- Country of origin Taiwan
| Manufacturer Nr. | 4-987 |
|---|---|
| Manufacturer | Bernstein |
| EAN | 4250838529891 |
| Weight | 0.021000 |
| HS-Code | 82041100 |
| GPSR manufacturer information | BERNSTEIN Werkzeugfabrik Industriehof Trecknase 1 DE-42897 Remscheid www.bernstein-werkzeuge.de |
| Article authenticity | Original product |
| Condition of article | New |
| Position sensing | No |












