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HTN Metric Range

The Hi-Force HTN range of metric top collar hydraulic nuts is specifically designed and manufactured for applications where regular, periodic opening of the joint for inspection and maintenance purposes is required. Unlike conventional hydraulic bolt tensioners, Hi-Force HTN series hydraulic nuts are designed to permanently replace standard hexagon nuts on one side of the bolted joint. Initially the bolt tension or elongation is applied hydraulically and once achieved, it is permanently retained via the integral mechanical load retaining collar.

Standard range models are available for bolt sizes from M24 to M100, with other sizes available to special order. All models are 21750 psi maximum working pressure and supplied with quick connect hydraulic couplings, compatible for use with Hi-Force air or manually operated hydraulic bolt tensioner pumps and hoses.

  • Capacities from 22 to 215 tons

  • Bolt sizes from M24 to M100 diameter

  • Working pressure 21750 psi

  • Single acting design with integral load holding lock nut

  • Designed to permanently replace regular nuts on one side of the joint

  • Ideally suited for bolted joints that need opening and closing, during maintenance, on a regular basis

  • High grade alloy steel construction with nitrocarburized corrosion resistant piston

  • Self-energizing seals for improved performance at high temperatures and pressures

  • Dual quick connect inlet and outlet couplings for easy multiple tensioner nut connection

  • Visible maximum stroke indicator to warn operator of potential over extension

  • Customized and special design tensioners are available on request


HTN Metric Bolt Tensioner  Specifications      

Note: Tommy bars are not included. Hi-Force recommends one tommy bar for every four tensioners.  

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