French FILTEC

Threaded sheath imported from France is a new type of internally threaded fastener that can be embedded in metal or non-metallic materials to form high-strength and wear-resistant
. It is an interchangeable standard internal thread and can also be used to repair wear or tear. Damaged internal threaded hole. The threaded sheath is a precisely shaped helical coil of diamond-shaped wire. It is a concentric body with internal and external threads, and one end has a radially bent mounting handle. In the free state, the diameter of the thread sheath is slightly larger than the internal thread it is installed into. During the assembly process, the torque added by the installation tool to the installation handle causes the diameter of the guide ring to elastically shrink, thereby entering the pre-used position. Thread

The threaded sheath is tapped into the internal threaded hole with a special tap. After installation, the threaded sheath expands like a spring, making it firmly fixed in place

In the internal thread hole, the thread sheath forms a high-precision internal thread that meets international standards. The uneven stresses caused between the bolt and the screw hole

The distribution of pitch and angle errors can be balanced by the elasticity of the thread sheath, whose entire helix can share the load. Threaded sheaths are divided into two types according to their functions: ordinary type and locking type. In addition to all the functions of ordinary models, locking type threaded sheaths also have thread locking capabilities. This

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It relies on the elastic force of its polygonal locking to brake the bolt.