Adhesion of fasteners

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Safe adhesion without loss of performance

ONSERT® technology allows adhesion of different fasteners to diverse materials.


An efficient connection

Böllhoff, as a specialist in mechanical joining technology, and DELO, as a specialist for intelligent bonding technology, have together developed a new fastening system.
It’s the ONSERT® technology – quick bonding of fasteners without loss of performance.

Your benefits

  • Optimised design ensures distortion-free surfaces; ideal where close tolerance or visual requirements are important. Fastening elements do not become apparent on the visible side through
  • Heat input such as it happens during welding and heat curing
  • Processing parameters independent of customer component
  • Full mechanical load capacity immediately after irradiation (no post-crosslinking)
  • Short curing times (< 5 sec)



There are two product families in the DELO range of adhesive products that are suitable for ONSERT® adhesion.


  • Light-curing acrylate
  • Curing in less than 10 seconds
  • Universal adhesion to various substrates
  • Application specific mechanical properties (ultimate elongation, TG, Young's modulus)


  • Light-curing epoxy resin
  • Curing in 5–60 seconds
  • For temperatures up to +150 °C
  • Chemical-resistant

DELO and BÖLLHOFF are pleased to assist you during the entire development process.

Bonding process

1. Dispensing


2. Joining


3. Curing


Product types

ONSERT® – The product range

  • ONSERT® basic – surface connection

    ONSERT® basic – surface connection

    A transparent plastic sheath is applied to fasteners. The geometry provides for sufficient bonding surface.

  • ONSERT® plus – ripp connection

    ONSERT® plus – ripp connection

    The fastening elements are over moulded with transparent plastic (adhesive dome) and are then fitted using light-curing adhesive. Adhesive domes can be produced in various designs, e.g. with internal threads, bolt threads, ball studs or snap connections.

Download Version Language Type/Size
Quick and process-reliable bonding of fastening
elements with light-curing adhesives
0250/16.02 English PDF / 481 KB

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Our partner DELO



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ONSERT® Adhesion of fasteners


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