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Intervis 3 holes

Threaded inserts, also known under the registered trademark INTERVIS®, are cylindrical fasteners used to self-create strong, durable threads in materials such as plastics, composites and soft to medium-hard metals. This type of insert provides optimum pull-out resistance in a multitude of materials ranging from soft plastics to metal alloys.

For INTERVIS® STHC with a lower height, 3 holes are applied to the self-tapping bushing to allow easy removal of material chips, while creating a tap in the assembly material which is pre-drilled.

In short, the 3-hole INTERVIS® SCTH is a practical alternative to standard 1-slot INTERVIS® for applications where heights and thicknesses are smaller. They are used in a variety of demanding industrial applications such as automotive and electronic equipment.

LGC Industries will work with you to design your solution (prototyping, measurement and tensile strength) and industrialize your project with installation and assembly solutions.

Threaded insert - threaded sleeve - 3-hole screwdriver

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 3-hole threaded insert?

The3-hole threaded insert belongs to the family of threaded inserts, and is simply a type of self-tapping threaded insert with a smaller height. 

The latter has 3 holes to easily evacuate the material chips created when tapping the material during installation.

This metal bushing features normal tapping as well as an external thread suitable for applications with smaller heights and thicknesses.

The3-hole threaded insert is generally used to fasten elements in flexible materials such as : 

  • The wood
  • Plastic
  • Composites

3-hole 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 LGC 3-hole threaded insert made?

The manufacturing process for Intervis® 3-hole 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 3-hole threaded insert?

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

The3-hole threaded insert is a part that offers several notable advantages over other types of self-tapping threaded inserts. The 3-hole threaded insert guarantees :

  • Increased strength: The innovative design of the 3-hole threaded insert, with its three slots, gives it exceptional strength against 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 and 3 holes mean longer life in soft materials, as the slots allow the bushing to distribute itself in the material, reducing stress and the risk of breakage.

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