Compact designs for more assembly space 06 January 2023

HEICO has newly introduced its HEICO-TEC® Compact Series, aptly named from its compact design which is suitable for various applications in hard-to-reach places. The range includes the HEICO-TEC® Tension Bolts alongside the HEICO-TEC® Tension Nuts, manufactured to allow for effective pre-tensioning force.

In bolted joints greater than M24, it is difficult for an operator to achieve an accurate preload, so they often resort to hydraulic or pneumatic tools – a time-consuming and expensive solution. With the new design of HEICO Befestigungstechnik GmbH’s HEICO-TEC® Compact Series, pre-tensioning force of the large main thread is distributed over several smaller pressure bolts. Instead of tightening a large nut or bolt with high torque, using the HEICO-TEC® Tensioning Systems allows for smaller pressure bolts which can achieve the same pre-tensioning force using a standard torque wrench.

HEICO-TEC® Tension Bolts, which expand the HEICO-TEC® Tensioning Systems product line, are specifically designed for confined space applications. Compared to a conventional bolt, the outside diameter and total head height of the one-piece HEICO-TEC® bolt are smaller. The single part design allows for easy user operation. Additionally, like the HEICO-TEC® Tension Nut, the HEICO-TEC® Tension Bolt creates torsion-free preload in the main bolt.  

HEICO states its HEICO-TEC® Tension Bolts in strength class 8.8 can directly replace same strength conventional bolts in the dimension range of M20 – M100. Also, in contrast to the HEICO-TEC® Tension Nuts of strength class 8 and 10, the HEICO-TEC® Compact Series uses high-strength set screws. The total height of the tension nut combines the height of the nut body and washer, also the set screws do not protrude from the nut body, resulting in a more compact design.

The standard size range for the HEICO-TEC® Compact Series is M20 – M160. The Compact Series is available in either uncoated or zinc-flake coated versions. Other dimensions, coating systems or materials are available on request from HEICO.

Becca England Assistant Editor t: +44 (0) 1727 615 413

Becca is the latest member to join our team and is eager to get stuck into the world of fasteners. She brings an enthusiastic and fresh outlook on what we do editorially and will be leading our social media activity – including sourcing material, editing articles and posting online.