V-COIL Wire thread inserts, Refill pack Free running type S M 12 x 1.75 - 2.5 D (5 pcs.)

• Restore a damaged internal thread in housings, covers, flanges, and similar components.
• Use in maintenance work where a repaired thread reduces downtime and avoids part replacement.
• Support repeated assembly when the parent thread has lost strength from wear or overload.

Note Use preparation tools and installation steps required by your insert system and verify thread engagement after installation.

• Restores a usable internal thread without changing the original screw size concept.
• Supports repeatable repairs which helps in service work and spare part planning.
• Can improve load distribution compared with a worn parent thread depending on installation quality.
• Keeps insert stock compact when you use refill packs for recurring repairs.
• Supports controlled assembly torque when the repaired thread is prepared correctly.

• Repair requires the correct preparation tools and a controlled installation process to avoid misalignment.
• Not ideal for emergency repairs without access to proper drilling, tapping, and installation equipment.

1. Assess the damaged thread and decide whether a wire insert repair is required.
2. Remove the damaged thread material with the correct preparation tool for the insert system.
3. Create the required internal thread form with the matching STI tap for the insert process.
4. Clean the thread area and remove chips so the insert seats without interference.
5. Install the wire insert with the correct driving tool until it reaches the specified position.
6. Remove the installation tang if the selected insert execution requires that step.
7. Check screw engagement by hand to confirm smooth assembly and full thread support.

• 5 pieces wire thread inserts, free running execution as stated in the product name

• System: V-COIL wire thread insert
• Insert type: Free running type S
• Thread designation: M 12 x 1.75
• Insert length: 2.5 D
• Thread system: Metric thread
• Pack quantity: 5 pieces

When do you choose a wire thread insert repair instead of re tapping the parent thread?

Choose a wire insert when the parent thread no longer provides sufficient engagement or when you want to keep the original screw size without enlarging the hole.

Does this insert match the thread designation M 12 x 1.75?

Match the designation in the product name with your screw thread standard and your prepared STI thread, then verify fit with a test fastener or a gauge as required by your process.

What does free running type mean in practical assembly?

Free running inserts keep normal running torque for the screw connection, so assembly feel stays close to a standard internal thread when the insert is installed correctly.

How do you prevent an insert from sitting too high or too low?

Control the driving tool position and stop when the insert reaches the required seating depth for your application, then verify that the first thread start is clean and unobstructed.

What should you check after installation?

Check smooth screw engagement by hand, confirm that the insert is seated without distortion, and ensure that no chips remain in the thread area.

Where do you find technical background for this execution?

Use the technical information for selection and process setup guidance. Technical information wire thread inserts DIN 8140 as PDF

How do you keep the process stable in repeated operations?

Use consistent preparation, stable guidance, and a clean working area so results remain comparable across batches.

Where do you find the complete catalog context for this product class?

For additional product and system information, use the catalog. VC 23 catalog as PDF