Achieve lasting reliability and ensure enduring performance and safety with our hydraulic nuts, ideal for permanent replacement when nuts are needed.
A hydraulic nut incorporates its own internal hydraulic jack, which enables large diameter bolts to be tensioned to high and accurate preloads. They are quick to install using a hydraulic pump which activates the internal jacking system. The effort required to tighten a very large diameter bolt is reduced to the effort needed to operate the pump, and if an air-driven or electric pump is used, the tightening process is even quicker.
Specifications
1500 bar and 2500 bar designs
Compact and cost-effective
Less stud protrusion required than for detachable tensioners
Sizes up to M400 ― larger sizes are available on request
100% simultaneous tension
Quick and easy to install
Available in shim, top, or bottom collar configurations
Custom designs available to your specificity
Product Benefits
Quick and easy to install
Even and accurate load as it is developed hydraulically
Low loss of initial load (shim)
No torque or torsion stress
No flogging hammers or spanners
Self-aligning (shim)
Improved fatigue performance
100% simultaneous tension
Long life of internal jack - very compact and cost-effective
Less stud protrusion required than for standard tensioners
Testing & CertificationBoltight is LRQA certified for quality and environmental assurance to ISO 9001: 2015. All tools are assembled, filled with oil and pressure-tested prior to dispatch.
Achieve lasting reliability and ensure enduring performance and safety with our hydraulic nuts, ideal for permanent replacement when nuts are needed.
A hydraulic nut incorporates its own internal hydraulic jack, which enables large diameter bolts to be tensioned to high and accurate preloads. They are quick to install using a hydraulic pump which activates the internal jacking system. The effort required to tighten a very large diameter bolt is reduced to the effort needed to operate the pump, and if an air-driven or electric pump is used, the tightening process is even quicker.
Specifications
- 1500 bar and 2500 bar designs
- Compact and cost-effective
- Less stud protrusion required than for detachable tensioners
- Sizes up to M400 ― larger sizes are available on request
- 100% simultaneous tension
- Quick and easy to install
- Available in shim, top, or bottom collar configurations
- Custom designs available to your specificity
Product Benefits
- Quick and easy to install
- Even and accurate load as it is developed hydraulically
- Low loss of initial load (shim)
- No torque or torsion stress
- No flogging hammers or spanners
- Self-aligning (shim)
- Improved fatigue performance
- 100% simultaneous tension
- Long life of internal jack - very compact and cost-effective
- Less stud protrusion required than for standard tensioners
Testing & CertificationBoltight is LRQA certified for quality and environmental assurance to ISO 9001: 2015. All tools are assembled, filled with oil and pressure-tested prior to dispatch.
