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The self-tapping threaded insert, also known as the self-tapping sleeve and under the INTERVIS® brand name, is a metal fastener with an internal thread and an external thread. What distinguishes the self-tapping sleeve from other fasteners is its slot in addition to the threads.

The self-tapping sleeve (INTERVIS® brand) is a metal sleeve with a standardized thread and an appropriate external thread. At its base, there is an external thread truncation and a slot with cutting edges. The Intervis® threaded insert is screwed directly into a pre-drilled smooth hole. The Intervis® threaded insert acts like a tap, threading itself into the hole. This type of fastening is ideal for use in medium-hard materials, such as light alloys, compressed wood and plastics.

Threaded insert - Threaded socket - Standard Intervis

What is a threaded insert?

Threaded inserts, also known as threaded bush or under the LGC registered trademark "Intervis®", are cylindrical fasteners used to self-create strong, durable threads in a wide variety of materials such as plastics, composites and soft and medium-hard metals.

Thanks to their ingenious design, these inserts offer a reliable and effective solution for reinforcing fasteners in industrial and commercial applications.

Whether for the assembly of plastic parts in the automotive industry or for fastening components in composite aircraft, Intervis® threaded inserts guarantee optimum pull-out resistance.

What is a threaded insert?

Thethreaded insert belongs to the family of threaded inserts. What distinguishes the self-tapping socket from other fasteners is its slot in addition to the threads.

The self-tapping socket (Intervis® brand) is a metal socket with a standardized thread and an appropriate external thread.

Thethreaded insert is generally used to fasten elements in flexible materials such as :

  • The wood
  • Plastic
  • Composites

Threaded inserts can be found in a variety of demanding industrial applications such as :

  • In the automotive industry
  • In electronic board mounting.
  • And also the attachment of components to bicycles, skis and snowboards.

How is an Intervis® LGC threaded insert made?

The manufacturing process for Intervis® threaded inserts begins in the same way as for conventional bushes.

First step: external threading of the raw material coil

This stage is called rolling, as the threaded sleeve passes between 3 rollers and the rolling system, which cold-forms the part by compressing it to create the thread. 

Second stage: cutting the raw material tube

The tube is cut to the desired length.

Chamfers or finishes can be added to the material.

Third step: milling

A milling cutter cuts the part, creating the characteristic Intervis® slot.

Last step: tapping

This is the internal thread of the threaded bush.

To do this, a rotating tap passes inside the part to give it a thread.

Would you like to find out more about our threaded inserts?

Discover our technical guide to Intervis® threaded inserts

What are the advantages of a threaded insert?

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

Thethreaded insert is a part that offers several notable advantages over other types of self-tapping threaded inserts. The threaded insert guarantees :

  • 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 3 slots ensure longer life in flexible materials, as the slots allow the bushing to spread out in the material, reducing stress and the risk of breakage.

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