What is a threaded slot insert?

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Theintervis slotted thread insert, also known as the threaded bush Intervis® is a cylindrical fastener used to self-create strong, durable threads in a wide variety of materials such as plastics, composites and soft to medium-hard metals.

Thanks to its ingenious design, this slotted threaded insert offers a reliable and effective solution for reinforcing fasteners in industrial applications requiring high assembly strength. 

Slotted threaded inserts are used as original fasteners or to repair broken threads.

Whether for assembling plastic parts in the automotive industry or fastening components in composite aircraft, the Intervis® slotted threaded insert guarantees optimum pull-out strength and attractive mechanical properties in the most demanding environments.

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What's special about the Intervis slotted threaded insert?

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Theslotted threaded insert belongs to the family of threaded inserts, also known as self-tapping threaded inserts. What distinguishes it from other fasteners is its extra slot, which enables self-tapping and thus simplifies installation of your insert.

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Self-tapping slot threaded inserts are generally used to fasten components in flexible materials such as :

• The wood
• Plastic
• Composites

Slotted threaded inserts can be found in a variety of demanding and standardized industrial applications such as :

• In the automotive industry
• In electronic board mounting.
• Fastening components in bicycles, skis and snowboards.
• In the plastics industry as an overmolded component.

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How is an Intervis® slotted threaded insert made?

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The start of the manufacturing process for Intervis® slotted threaded inserts is similar to that for conventional inserts.

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First step: external threading of the raw material coil

This stage is called rolling, as the tube passes between 3 rollers and the rolling system, which will cold deform the part by compressing it to create the external thread of the intervis threaded insert.
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Second stage: cutting the raw material tube

The tube is cut to the desired length.

It is possible to add chamfers or finishes to the material, as with the threaded insert for wood, or the BFUP threaded insert for concrete.

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Third step: milling

A milling cutter cuts the part, creating the characteristic slot of our Intervis® threaded insert.

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Last step: tapping

This is the internal thread of the Intervis® slotted threaded insert.

To achieve this, a rotating tap passes inside the insert to give it its thread. The threaded insert then becomes a tapped threaded insert and thus a self-tapping threaded insert.

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Would you like to find out more about our slotted threaded inserts and how they are manufactured?

Discover our technical guide to Intervis® threaded inserts

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What are the advantages of a threaded insert?

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Each type of threaded insert offers distinct functionalities, accompanied by advantages both in terms of use and in their respective technical specifications.

The intervis®slotted threaded insert is a part with several notable advantages over other types of self-tapping threaded inserts. The intervis threaded insert guarantees :

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• Increased strength: The innovative design of the threaded insert, with its three slots, gives it exceptional strength in the face of tensile and shear forces. This enhanced strength ensures a robust, long-lasting fastening, perfectly suited to applications requiring maximum safety.
• Durability over time: the threaded insert's slots enable it to last longer in flexible materials. In fact, the slots allow the insert to distribute itself in the material, reducing stress and the risk of breakage.
• Very fast installation: as there's no need to create a tap for the receiving hole, the intervis threaded insert eliminates a step in the installation process and saves precious time.