Tension Nut

Simple · Fast · Reliable

HEICO-TEC Spannmuttern

For a secure joint with a HEICO-TEC® Tension Nut, no electric, hydraulic, or pneumatic tools are needed. All you need is a torque wrench.

The HEICO-TEC® Tension Nut is unique in the fact that the pretension force of the large main thread is distributed to many smaller pressure bolts. Because the pressure bolts are smaller, a conventional torque wrench can be used to achieve the correct pretension force. This eliminates the need for complex, bulky, or heavy tools and makes securing large bolted joints more convenient and easy.

Tension Nuts according to ISO 898-2

HEICO-TEC® Tension Nuts in strength class 8 and 10 meet all the requirements of ISO 898-2 which enables you to easily replace any hex nut from the same strength class while also offering all the advantages of a hand-tightened nut.

Our standard program of HEICO-TEC® Tension Nuts offers you the following advantages:

  • Fast delivery: On stock and therefore directly available
  • Compatible with DIN EN ISO 898-2: Direct replacement of hex nuts from the same strength class possible
  • Extended service through consultation as well as installation aids for technical documentation (e.g. assembly template)

HEICO-TEC® product overview

HEICO-TEC® Tension Nuts product overview (ISO metric)

HEICO-TEC® Tension Nuts product overview (inch sizes)

Fields of application


steel industry


heavy industry