TriPress®

Reduces asembly time by up to 75%.

The TriPress® rapid fastening system is the innovative alternative to conventional fastening technology so necessary with the trend towards lightweight construction in the automotive industry.

TriPress® is a triangular rapid fastening system that can be clinched into plastic and light metals. During the clinching operation, the two components of the TriPress® fastener connect together quickly and economically.

It is available in the following designs:

  • Triangular shank and knurl parallel with axis (figure 2) provide greater torsional strength.
  • Circumferential locking flutes on triangular shaft (figure 3) generate high pull-out resistance.
  • Combination of grooves and knurls permit positive-fit fastenings and achieve high torsional torques and pull-out forces (figure 4).
  • So the fastener can be clinched into pre-prepared holes or injected as inserts into plastic housings.

The advantages of the triangular shape:

  • Approximately 35% greater torsional torques compared with round-knurled bolts
  • Greater vibration resistance
  • Greater reliability when fitting nuts TriPress®
  • Centre collar version (MB)


TriPress® connecting fastener
Benefits of the circumferential locking flutes:

  • Improves pull-out forces
  • Extremely secure against unscrewing by itself

The advantages of TriPress® over screwed fastenings:

  • 75% less fitting time
  • no assembly errors
  • independent of pre-stress forces
  • path-controlled clinching operation
  • uses more economical operative materials and tools


The advantages over injection screws (into synthetic materials):

  • no need to insert metal parts into injection moulds
  • shorter cycle times (injection)
  • no lost fastener elements

TriPress® Simulation

The rapid fastening system TriPress®.

The TriPress® clinch pin joins plastic to metal. Its trilobular shaft its locking flutes ensure that they are easy to insert, and maintain high holding force and excellent vibration resistance. Torsion resistance is around 35% higher than for round pins.


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