Nut Fasteners

The HYTORC NUT is a 3-part tensioning system for extremely difficult applications. The special construction lets the bolt move with the inner sleeve without side loads, torsion or reaction because the nut does not turn on the flange surface. The bolts are 100% mechanically tensioned. The solution combines the best features of bolt tensioning with hydraulic torque wrench usage. The method is in use on many critical applications from nuclear reactors to turbines and above all where ever time usage in bolting operations needs to be minimized.

  • No reaction arm or reaction point needed
  • Fast and simple to use
  • Reusable
  • Eliminates the need for bolt elongation measurement
  • Precision straight-pull tensioning with calibrated bolt load accuracy of +/- 5%
  • Suitable for even tight spaces and high temperatures up to 537°C


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NUT Fasteners
ITEM Application attributes
CN-series Excellent universal fastening element
TN-series Designed to overcome the tight radial restrictions
SN-series Ideal choice for tight overhead restrictions where traditional fasteners can’t fit
GT-series Designed to handle
elevated temperatures, high stress and greater load to breakout




HYTORC is the world’s leader in hydraulic and pneumatic torque wrench manufacturing. With over 50 years of experience focused entirely on developing the highest quality industrial bolting systems, HYTORC is the most trusted name in the industry. The latest product line features patented industry-firsts like hands-free operation, onboard documentation systems and industry-leading bolt load accuracy to reduce nut loosening and joint failure. Haitor has been cooperating with HYTORC throughout its whole lifetime. Visit manufacturer's website >>

Product Sheet

Product Sheet (in Finnish) [PDF]

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