Torque management nuts that prevent human error. They help prevent forgetting to tighten and maintain the tightening torque within the appropriate range.
When the cap set on the nut reaches the appropriate torque, the inner claws break, and the cap spins freely to indicate that the installation is complete. A capped state indicates that installation is not yet complete. The work is finished when the cap is removed and the nut is exposed. This prevents not only forgetting to tighten or insufficient tightening but also seizing due to over-tightening. It is possible to tighten with the appropriate torque using only an impact wrench, without the need for a torque wrench or special tightening machinery.
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basic information
There are various types of locking nuts in the world. All locking nuts exhibit their locking function when tightened to the appropriate torque value. However, if the operator forgets to tighten them, the locking function will not be activated. Conversely, over-tightening can lead to issues such as seizing. To prevent human error in advance, KFC has developed a nut that combines unprecedented resin products with steel products to add torque management functionality. A polycarbonate cap is set with the locking nut. When the specified torque is reached, the contact point between the inside of the cap and the nut breaks, causing the cap to spin freely and detach, thus completing the installation at the appropriate torque value. The Torq-Nut "K" is set with our locking K nut. The Torq-Nut "ZK" is set with our locking K nut with a washer.
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Applications/Examples of results
Construction work that involves a large number of fastening tasks Projects with strict time constraints that require acceleration Work that particularly needs to consider human errors such as forgetting to tighten or over-tightening Projects where efficiency in fastening and inspection tasks in high places or difficult locations is desired are suitable for this. It is especially recommended for projects that require torque management after construction and those that do not rely on skilled workers. It is used in construction work such as highway signs and facilities, where strict tightening torque management is necessary.
Detailed information
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Torsion nut cap
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Locking K nut
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K nut with washer for preventing loosening
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Torsion Nut Installation Method Diagram
Line up（5）
| Model number | overview |
|---|---|
| TNK8 | A locking nut K nut (M8, SUS304) is included. |
| TNK10 | A locking nut K nut (M10, SUS304) is included. |
| TNK12 | A locking nut K nut (M12, SUS304) is included. |
| TNZK 8 | This product is made to order. A K nut with washer (M8) is included. |
| TNZK 10 | This product is made to order. A K nut with washer (M10) is included. |
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Company information
As a pioneer in post-installed anchors in Japan, KFC was founded in 1965. We respond to customer needs with a consistent system from product development to sales and construction. Our business activities focus on three main areas: construction fastening materials such as post-installed anchors, materials for tunnel excavation like rock bolts and auxiliary methods, and various construction projects related to seismic reinforcement, safety measures, equipment, and refreshment.