Heico Fasteners to launch new tension nut on stand C60

05 October 2016

​Heico Fasteners, manufacturers of the HEICO-LOCK® anti-vibration wedge lock washers, will be launching their new HEICO-TEC tension nut on stand C60 that promises to eliminate the need for specialist tooling for large bolted joints.


The HEICO-TEC tension nut is unique in the fact that the pre-tension force of the large main thread is distributed to many smaller pressure bolts. Because these pressure bolts are smaller a conventional torque wrench is all that is needed to achieve the correct pretension force, eliminating the need for complex, bulky or heavy tools and makes securing large bolted joints more convenient and easy.

Working with large bolted joints usually means an engineer having to arrange specialist electric, hydraulic or pneumatic bolt tensioning services. HEICO-TEC does away with these time consuming and potentially expensive options and indeed is so fast that HEICO-TEC nuts are often tightened in the same time it takes to set up such tooling.

With HEICO-TEC the nut body is screwed onto the main thread just like a conventional nut – but it is not tightened. Several pressure bolts with associated pressure pins are arranged around the main thread inside the nut body. When the pressure bolts are tightened they push the pressure pins against the part to be tensioned and at the same time the bolts elongate. The pre-tension force created in this way is purely axial and therefore free from harmful torsion or bending. The HEICO-TEC nut also includes an incorporated hardened washer that protects the tensioned parts from high pressure loads caused by the pressure pins.

Also HEICO-TEC tension nuts comply with ISO 898-2 requirements, meaning engineers can directly use any conventional nut from the same strength class.

So come and visit Heico on stand C60 to see how they can solve your large bolted joint problems.