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Tensioning Hardware

Hydraulic Nut

Produces uniform compression of casings, flanges, bearing housings or connection rods and eliminates erratic bolt loads with a unique metal-to-metal seal design.

Hydraulic Nut

Product Overview

Our hydraulic nut eliminates conventional bolt load torquing inaccuracies occurring from stud twisting and friction losses at the nut face and thread interfaces. The compact standard sizes of our hydraulic nut are ideal for confined spaces or where envelope restrictions prevail.

Whether you tension one bolt or several bolts at a time, our hydraulic nut produces uniform compression of casings, flanges, bearing housings or connection rods. The improved tensioning return of the nut will eliminate excessive and erratic bolt loads. The multi-bolt tensioning serves to shorten assembly and/or maintenance time. Additionally, our hydraulic nut allows for a minimal number of operators, which translates to cost savings.

Key Features

  • Unique Metal-to-Metal Seal Design
  • Tolerant to Harsh Environments
  • Applications up to 500°F
  • Water Charged for Special Applications
  • Multi-bolt Tensioning — Simultaneous 'Daisy Chaining'
  • Uniform Clamp Loads Across All Bolts
  • Accommodates Confined Spaces and Envelope Restrictions
  • Compact Standard Sizes and Custom Designs Available

Applications

Turbine Casings
Flanges
Bearing Housings
Connection Rods
Compressor Casings
High Temperature Applications (up to 500°F)
Confined Space Bolting
Nuclear Power Plant Applications
Steam Turbine Maintenance

Technical Specifications

Seal DesignMetal-to-Metal (no elastomeric seals)
Max TemperatureUp to 500°F standard; higher on request
Special MediumWater charged available
Multi-Bolt OperationSimultaneous daisy-chaining
Standard SizesCompact range — contact for sizing
Custom DesignsAvailable
EnvironmentSuitable for harsh environments
Product Demo

See It In Action

Watch a live demonstration of our Hydraulic Nut.

Ready to Order or Need Help Specifying?

Our engineers are available to assist with product selection, sizing, and custom configurations.