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INTERVIS threaded inserts, also known as self-tapping threaded inserts, are metal fasteners with internal and external threads.
What distinguishes the self-tapping threaded insert from other fasteners is its slot in addition to the threads.
- The self-tapping threaded insert (INTERVIS® brand) is a metal insert with a standardized thread and a suitable external thread.
- At its base, there is an external thread truncation and a slot with sharp 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 fastener is ideal for installation in medium-hard materials such as light alloys, compressed wood and plastics.
Threaded inserts - self-tapping threaded inserts - Intervis
Threaded inserts - self-tapping threaded inserts - Intervis
- Feasibility checks using the FMEA tool, which is used to analyze failure modes, their effects and criticality.
- Production of initial samples in medium series, and validation of production with PPAPs in accordance with IATF 16949.
- Development of detailed production processes according to the APQP quality process
- Collection and analysis of production data to identify trends and variations. 3PPM in 2023.
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What is a threaded insert?
Self-tapping threaded inserts are indispensable for repairs and threading in materials that cannot be tapped.
In soft and medium-hard materials such as light alloys, plastics and compressed wood, threaded holes often fail to withstand repeated stresses. If a screw is tightened too vigorously or too frequently, the threads may pull off, rendering the part unusable.
This is where the self-tapping bush, also known as the threaded insert, comes in!
A self-tapping threaded insert creates an extremely solid anchorage with the material in which it is installed, as the threaded insert itself creates its own thread during assembly. With this type of self-tapping insert, there's no need to pre-drill as with other conventional threaded inserts, or to drill and then tap as when installing a helicoil. A self-tapping insert thus offers greater resistance to pulling out when loosening.
An Intervis self-tapping thread insert has a standardized thread and a suitable external thread.
- External thread truncation.
- Two slots with sharp edges.
Using this set, you can screw the threaded insert directly into a pre-drilled smooth hole, just as you would with a tap.
Threaded inserts, self-tapping threaded inserts: the advantages of Intervis®.
At LGC Industries, we have developed the Intervis brand, an innovative threaded insert.
The Intervis threaded insert offers a practical tapping and screwing solution, allowing you to insert your socket directly into a pre-drilled hole. Thanks to its ability to cut its own thread into the material, this Intervis threaded insert guarantees extra security and strength.
We recommend the use of Intervis threaded inserts in aluminum assemblies, as their surface treatment eliminates the electrolytic torque between the two materials. Drilling groups are an average indication. During installation, it is advisable to carry out a trial run by drilling 1/10th above or below the indicated diameter, to take account of the particular characteristics of certain materials.
Intervis® threaded inserts offer several advantages:
- Inserts into material without pre-tapping
- Eliminate play between spacer and workpiece
- Excellent pull-out resistance
- Between 30% and 40% overlap, Intervis® reaches its maximum pull-out resistance
- Eliminates thread wear
- Absolute safety in use
At LGC Industries, there are several ranges of Intervis® self-tapping threaded inserts available in different materials such as Crude Steel (SCTA), Chromium 6-free Zinc-plated Hardened Steel (SCT), Brass or Stainless Steel.
The different types of Intervis® threaded inserts
Standard Intervis slotted thread insert
The Intervis® standard threaded slot insert is inserted directly into a pre-drilled hole. It works like a tap, creating the thread in the hole itself. This type of fastening is ideal for medium-hard materials such as light alloys, compressed wood or plastics. Installation of this self-tapping insert is simple and efficient.
Intervis 3-hole slotted thread insert
For Intervis® STHC slotted threaded inserts slotted threaded inserts, we have added 3 holes on the self-tapping insert to facilitate the evacuation of material chips when tapping the assembly material.
In short, the 3-hole Intervis® SCTH threaded insert is a practical alternative to standard 1-slot Intervis® threaded inserts where heights and thicknesses are smaller.
Would you like to find out more about our Intervis® self-tapping threaded inserts?
Visit our dedicated article: All you need to know about Intervis® threaded inserts
All Intervis® threaded inserts are available in :
- Stainless steel
- Steel
- Brass