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 1500 bar 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 198 to 1911 kN
  • Bolt sizes from M24 to M100 diameter
  • Working pressure 1500 bar
  • Single acting design with integral load holding lock nut
  • High grade alloy steel construction
  • Nitrocarburised piston
  • Visible maximum piston stroke indicator
  • Dual quick connect couplings for easy connection

Hydraulic Tensioner Nuts Metric Range
Model Number Bolt Size Capacity Effective area cm2 Stroke mm Weight kg Tommy Bar
kN tonnes
HTN1-M24 M24 x 3 198 20.2 13.2 5 1.9 TTB06
HTN2-M27 M27 x 3 216 22.1 14.4 5 2.0 TTB06
HTN3-M30 M30 x 3.5 253 25.8 16.9 5 2.4 TTB06
HTN3-M33 M33 x 3.5 253 25.8 16.9 5 2.4 TTB06
HTN4-M36 M36 x 4 306 31.2 20.4 5 2.7 TTB06
HTN5-M39 M39 x 4 344 35.1 22.9 6 2.9 TTB06
HTN6-M42 M42 x 4.5 398 40.5 26.5 6 3.5 TTB06
HTN7-M45 M45 x 4.5 475 48.4 31.7 6 4.0 TTB06
HTN8-M48 M48 x 5 501 51.1 33.4 6 4.2 TTB06
HTN9-M52 M52 x 5 564 57.5 37.6 6 4.9 TTB06
HTN10-M56 M56 x 5.5 746 76.1 49.8 8 6.4 TTB06
HTN11-M60 M60 x 5.5 905 92.3 60.3 8 8.0 TTB06
HTN11-M64 M64 x 6 905 92.3 60.3 8 8.0 TTB06
HTN12-M68 M68 x 6 1000 101.9 66.7 8 8.8 TTB08
HTN13-M72 M72 x 6 1203 122.7 80.2 8 10.6 TTB08
HTN13-M76 M76 x 6 1203 122.7 80.2 8 10.6 TTB08
HTN14-M80 M80 x 6 1414 144.1 94.3 10 12.9 TTB08
HTN15-M85 M85 x 6 1605 163.6 107 10 16.2 TTB10
HTN15-M90 M90 x 6 1605 163.6 107 10 16.2 TTB10
HTN16-M95 M95 x 6 1705 173.8 113.6 10 18.3 TTB10
HTN17-M100 M100 x 6 1911 194.9 127.4 10 21.9 TTB10

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


Model Number Dimensions in mm
A B C D
HTN1-M24 72 55 18 132
HTN2-M27 75 55 18 132
HTN3-M30 82 57 21 134
HTN3-M33 82 57 21 134
HTN4-M36 88 57 22 135
HTN5-M39 93 58 21 135
HTN6-M42 100 62 23 142
HTN7-M45 106 64 24 141
HTN8-M48 110 64 25 142
HTN9-M52 117 67 32 145
HTN10-M56 128 74 28 152
HTN11-M60 141 77 29 155
HTN11-M64 141 77 29 155
HTN12-M68 150 78 30 156
HTN13-M72 162 81 31 159
HTN13-M76 162 81 31 159
HTN14-M80 174 87 35 165
HTN15-M85 187 95 37 173
HTN15-M90 187 95 37 173
HTN16-M95 194 102 39 179
HTN17-M100 205 110 41 188