Thread technology

Have a look at our brand products HELICOIL® and AMTEC®
and the many technologies made by Böllhoff.

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  4. Thread technology HELICOIL®, AMTEC®...

Creating threads in metals and plastics

We are specialised in creating threads in the most different materials. To do so we apply proven technologies such as screwing in HELICOIL® thread inserts in metals.

  • HELICOIL® plus threaded inserts

    HELICOIL® thread inserts

    For high-strength fastenings

    HELICOIL® thread inserts create high-strength fastenings in metallic low-strength materials and have been well established on the market for about 50 years.

  • HELICOIL® plus

    HELICOIL® thread repair

    Thread repair is worth it with HELICOIL® plus

    HELICOIL® plus repair range kits allow easy installation of a new thread in only a few steps.

    HELICOIL® thread repair
  • AMTEC®

    AMTEC® thread inserts

    Highly wear-resistant thread inserts for plastic parts

    AMTEC® stands for "After Moulding TEChnology" and refers to the installation of brass thread inserts into plastic components after moulding.

  • IMTEC® Moulded inserts for plastics

    IMTEC® Moulded inserts

    IMTEC® refers to the „In-Moulding TEChnology“ and describes the in-moulding of metal thread inserts with plastics before ejection.

  • HELICOIL® lock nuts

    HELICOIL® nuts

    Special nuts with screw lock

    HELICOIL® locknuts are a combination of high-strength nut bodies and HELICOIL® thread inserts.

    HELICOIL® locknuts
  • SEAL LOCK® sealing nuts

    SEAL LOCK® sealing nuts

    Sealing of bolt-nut joints

    SEAL LOCK® sealing nuts are an economical solution for reliable sealing against gaseous and liquid media under high pressure.


    KOBSERT® thread inserts

    Thread reinforcement in metals

    KOBSERT® threaded bushes are the ideal solution for creating highly wear-resistant, vibration-resistant and torsion-proof nut threads in metal low-strength materials.

  • UNITEC® K' in K'

    UNITEC® K' in K' plastic fasteners for plastics

    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.

    UNITEC® K' in K'

    ONSERT® Adhesion of fasteners

    Quick and process-safe adhesion

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


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