HTN

HTN Metric Range

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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 22.3 to 214.8 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
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Hydraulic Tensioner Nuts Metric Range
Hydraulic Tensioner Nuts Metric Range
Model Number Bolt Thread Size Capacity Effective area inch2 Stroke inch Weight lbs Tommy Bar
kN Tons
HTN1-M24 M24 x 3 198 22.3 2.05 0.20 4.2 TTB06
HTN2-M27 M27 x 3 216 24.3 2.24 0.20 4.4 TTB06
HTN3-M30 M30 x 3.5 253 28.4 2.61 0.20 5.3 TTB06
HTN3-M33 M33 x 3.5 253 28.4 2.61 0.20 5.3 TTB06
HTN4-M36 M36 x 4 306 34.4 3.16 0.20 6.0 TTB06
HTN5-M39 M39 x 4 344 38.7 3.56 0.24 6.4 TTB06
HTN6-M42 M42 x 4.5 398 44.7 4.11 0.24 7.7 TTB06
HTN7-M45 M45 x 4.5 475 53.4 4.91 0.24 8.8 TTB06
HTN8-M48 M48 x 5 501 56.3 5.18 0.24 9.3 TTB06
HTN9-M52 M52 x 5 564 63.3 5.82 0.24 10.8 TTB06
HTN10-M56 M56 x 5.5 746 83.9 7.71 0.32 14.1 TTB06
HTN11-M60 M60 x 5.5 905 101.7 9.35 0.32 17.6 TTB06
HTN11-M64 M64 x 6 905 101.7 9.35 0.32 17.6 TTB06
HTN12-M68 M68 x 6 1000 112.3 10.33 0.32 19.4 TTB08
HTN13-M72 M72 x 6 1203 135.2 12.44 0.32 23.4 TTB08
HTN13-M76 M76 x 6 1203 135.2 12.44 0.32 23.4 TTB08
HTN14-M80 M80 x 6 1414 158.9 14.61 0.39 28.4 TTB08
HTN15-M85 M85 x 6 1605 180.3 16.59 0.39 35.7 TTB10
HTN15-M90 M90 x 6 1605 180.3 16.59 0.39 35.7 TTB10
HTN16-M95 M95 x 6 1705 191.5 17.61 0.39 40.3 TTB10
HTN17-M100 M100 x 6 1911 214.8 19.75 0.39 48.3 TTB10

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


Model Number Dimensions in inch
A B C D
HTN1-M24 2.84 2.17 0.71 5.2
HTN2-M27 2.96 2.17 0.71 5.2
HTN3-M30 3.23 2.25 0.83 5.28
HTN3-M33 3.23 2.25 0.83 5.28
HTN3-M36 3.47 2.25 0.87 5.32
HTN5-M39 3.66 2.29 0.83 5.32
HTN6-M42 3.94 2.44 0.91 5.59
HTN7-M45 4.18 2.52 0.95 5.56
HTN8-M48 4.33 2.52 0.99 5.59
HTN9-M52 4.61 2.64 1.26 5.71
HTN10-M56 5.04 2.92 1.1 5.99
HTN11-M60 5.56 3.03 1.14 6.11
HTN11-M64 5.56 3.03 1.14 6.11
HTN12-M68 5.91 3.07 1.18 6.15
HTN13-M72 6.38 3.19 1.22 6.26
HTN13-M76 6.38 3.19 1.22 6.26
HTN14-M80 6.86 3.43 1.38 6.5
HTN15-M85 7.37 3.74 1.46 6.82
HTN15-M90 7.37 3.74 1.46 6.82
HTN16-M95 7.64 4.02 1.54 7.05
HTN17-M100 8.08 4.33 1.62 7.41