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  1. Böllhoff Switzerland
  2. Products
  3. Fasteners
  4. KAPTI® functional elements for thin-walled components

Riveting technology

KAPTI® functional elements

KAPTI® stands for efficient thread creation and the flexible implementation of additional functions such as compression limiting in thin-walled components.

KAPTI® Rivet press nuts

High-strength functional elements

Easy and efficient

KAPTI® functional elements are a reliable and easy to install solution for creating threaded joints in thin-walled components that provide a secure hold.

Plus factors

Advantages KAPTI®

  • High economic efficiency

    The KAPTI® functional element can be processed press-integrated so that a great number of fasteners can be inserted into the component in a single operation.

  • Very good joint charcateristics

    Our functional elements offer high push- and pull-out forces and offer the possibility of transmitting high torques in the field of thread generation.

  • Mechanical joining process

    Compared to thermally joined functional elements, no harmful gas extraction is required, the component does not experience any heat distortion and joining of coated components is also possible.

  • Flexible processing

    Our functional elements can be integrated into a press as well as being processed using C-frame setting tools.

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Method and principle

High-strength and captive

Our KAPTI® product group includes mechanical functional elements that enable the creation of threads, for example, and can be inserted into thin components without loss. KAPTI® functional elements are suitable for both manual and automated processing and are characterised by their universal applicability, e.g. they can also be inserted into already painted or coated sheets.

Find the right solution for your application

Product types

  • KAPTI® Rivet

    KAPTI® Rivet – High-strength rivet nutsQuick and easy installation into pre-punched sheet metal via a mechanical process

    Technical properties

    • Available sizes: M5, M6, M8, M10
    • Property class 8
    • Corrosion resistance as per customer requirements
    • Suited for different sheet thicknesses (0.7 mm – 2.5 mm)
    • Maximum tensile strength of the sheet metal part: 600 MPa
    • Compatible with property class 8.8 screws
    • Requires a defined pilot hole

    Advantages

    • High economic efficiency through press-integrated processing
    • Mechanical attachment in the component, thus
      • no exhaust system required
      • no thermal distortion of the components
    • Installation also in coated components
    • One sided flushness with the component, therefore no interference contour
  • KAPTI® Limiter

    KAPTI® Limiter is a threadless rivet sleeve that reliably protects your plastic components from cracking and creeping, even under high clamping forces.

    The mechanical riveting process creates a permanent, form-fit connection between the element and the component—resulting in a stable, load-bearing joint. This ensures that the clamping force is effectively maintained during bolted assembly.

    Versatile in use: The KAPTI® Limiter fits a variety of plastic components and allows the same element geometry to be used across different component thicknesses.

    Advantages

    • Component protection
      Protects against cracking in the component by absorbing the compressive stresses during screw fastening.
    • Preload force protection
      Prevents the plastic from creeping and thus secures the preload force permanently.
    • Flexibility
      One element for different component thicknesses enables flexible design.
    • Tightness
      The sealing lips ensure a media-tight connection.
    • Cost-effectiveness
      Press-integrated processing enables cost-efficient production.
    • Environmentally friendly
      Mechanical fastening without heat input preserves material integrity.

Video

The KAPTI® technology

Find out in short videos how the KAPTI® elements from Böllhoff work in detail and what advantages they offer you.

Processing solutions

Press-integrated or C-frame processing

The KAPTI® functional elements can be processed manually or partially or fully automatically. The elements are separated in a feeder and conveyed to the press or a C-frame system via a feed tube.

The economic advantage of press-integrated processing is that several functional elements can be inserted into the component at the same time in a single operation or press stroke. Compared to weld nuts, for example, a significantly higher output rate can be achieved.

INFORMATION AND MORE

Downloads

Are you interested in KAPTI? Please download further information here.

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