TEPRO® K' in K' – Plastic components in plastics

 

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Screwing solutions made of plastic for plastics

The K' in K' system was especially developed by us and is characterised by special thread profiles. The different system variants are self-locking, self-tapping, self-forming, adjustable and tolerance-compensating.

Characteristics

UNITEC® K' in K' Logo

The material combinations of component and screw / thread insert decisively influence the choice of fastener.
While rather metal elements are used for non-positive metal component screwings, they are often oversized for fastening plastic components and also less suitable due to their material incompatibility. Under dynamic, swinging or thermic load, over the middle and long term, direct screw-fittings with metal screws result in problems regarding tight fit or even in a failure of the screwed connection.

Our solution is the development of the Plastic in Plastic (in the German abbreviation: K' in K') screwing principle. Apart from variants of K' in K' screws and thread inserts, often solutions have to be realised in thinner sheets and plastic plates. For these applications, K' in K' systems have been developed in which the screw or thread insert is joined with a clip or rivet.

General benefits

  • No corrosion
  • Chemical resistance
  • Electromagnetic compatibility
  • Reduced weight due to full-plastic solution
  • Recyclability - no expensive separating of components
  • Low thermal conductivity / isolator
  • Free choice of colours

Technology

Mode of action and functional principle of thread profiles

For K' in K' plastic screwings, thread geometry is of decisive importance since K' in K' threads have to self-form or self-tap a "holding thread" into the pre-fabricated cylindrical or conical drill hole.
Depending on the thread forming, threads are subdivided into coarse threads and round and high threads.

  • UNITEC® - Coarse thread

    Coarse thread

    For hard, solid base materials requiring a rather tapping screw-in process

  • UNITEC® - Round and high thread

    Round and high thread

    For base materials of high elongation and impact strength for which thread forming is rather carried out during deformation

Product types

  • UNITEC® K' in K' screw

    The Screw

    Special benefits

    • Screwing with high reverse lock
    • Tolerance-compensating due to adjustability


    Head designs

    • Flat head screw with cross recess
    • Cheese head screw with cross recess
  • UNITEC® thread insert for thermal installation

    The thread insert for thermal installation

    Special benefits

    • Stress-free installation
    • High pull-out resistance
    • Short welding times (approx. 3 sec.)
    • Very low noise emission upon welding
  • UNITEC® thread insert for mechanical insertion

    The thread insert for mechanical insertion

    Special benefits

    • Screwing with high reverse lock
    • Tolerance-compensating due to adjustability
  • UNITEC® K' in K' screw-in blind rivet

    The K' in K' system screw-in blind rivet

    Special benefits

    • Assembly from one side


    The screw-in blind rivet has been especially developed for round mounting holes. It is captively pressed into the drill hole in component A. After that, component B is positioned and the self-forming K' in K' screw is screwed into the screw-in clip.

  • UNITEC® K' in K' screw-in blind rivet

    The K' in K' system body-bound rivet

    Special benefits

    • Assembly from one side


    The body-bound rivet is captively pressed into the drill hole in component A. After that, component B is positioned and the self-forming K' in K' screw is screwed into the body-bound rivet. Upon screwing in the K' in K' screw, the square of the body-bound rivet is expanded and forms an interlock in the component.

More detailed information is provided in our TEPRO® K' in K' product catalogue.

Download Version Language Type/Size
TEPRO® K` in K`
Threaded plastic fasteners solutions for plastic assemblies
4330/15.02 English PDF / 431 KB

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TEPRO® K' in K' – plastic components in plastics


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