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For critical applications requiring the highest level of bolt load control, the patented HYTORC Nut system provides industry-leading joint integrity. This three-piece fastener applies pure tension to the bolt to prevent thread damage and ensure bolt load accuracy. Available in a variety of materials to suit all applications, from extreme temperatures to harsh climates.

Bolt Tensioner - Calibrated Load Accuracy
No other bolting system provides the same level of repeatable accuracy, ensuring even bolt load to eliminate joint failure and unintentional nut loosening.
Tool Longevity
Other bolting systems put the reaction arm and square drive on opposite sides of the tool causing high stress in the body of the tool, which can lead to failure over time. The HYTORC Nut puts the action and reaction on the square drive axis to eliminate the majority of internal stress, and increase the lifetime of your tools.
Gall-free Removal
The HYTORC Nut is the only fastener that can guarantee the elimination of galled or damaged threads on installation and removal. These fasteners have been installed on various high temperature applications for ten years and longer, and were removed without damage to the bolts, providing tremendous savings by eliminating the need for bolt replacement.


Our most popular Nut! Designed to overcome the tight radial restrictions and high temperatures in steam turbine engines. When a bolted connection has a challenging counter bore or flanged radius, the TN-Series Nut will solve the problem.


Originally specified for Gas Turbine applications to handle elevated temperatures, high stress and greater load to breakout factors. For oversized applications where higher loads and breakout torques are needed.


The CT Nut’s thicker outer sleeve minimizes stress and allows it to handle high loads at elevated temperatures. The through-bolt design makes them ideal for applications with high stud protrusions from the flange.

Low Clearance Style Nut

The low-profile SN Series is the ideal choice for tight overhead restrictions where traditional fasteners can’t fit. The through-bolt design is useful for situations where high stud extensions make standard nuts impractical.