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Helical insert W.TEC® INSERT COIL Free Running fine thread
Helical insert W.TEC<SUP>®</SUP> INSERT COIL Free Running fine thread - 1
Helical insert W.TEC<SUP>®</SUP> INSERT COIL Free Running fine thread - 2
Helical insert W.TEC<SUP>®</SUP> INSERT COIL Free Running fine thread - 3
Helical insert W.TEC<SUP>®</SUP> INSERT COIL Free Running fine thread - 4

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Helical insert W.TEC® INSERT COIL Free Running fine thread

According to DIN 8140 with reduced outer diameter for improved installation. For producing a lasting, heavy-duty female thread. With free running (FR) true-to-gauge thread. Made of stainless steel.

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Available in 43 versions

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Perfect combination of space-spacing and wear-resistant thread strength


  • In low-strength metal materials

  • In plastics


Optimal force distribution


Flexibility of the thread inserts compensates for pitch and angle errors



Thread insert sits securely



Minimised thread friction torque and minimised torsional stress



Increased corrosion resistance



Space and weight minimisation


Smaller number of required connection points and/or reduced screwing dimensions



Costs minimised


By reinforcing the thread, which effectively minimises the repair costs

The tolerance position of the ISO thread corresponds to 6H following installation.