Bolt Tensioners & Hydraulic Nuts
1500 Bar topside single-stage and multi-stage hydraulic bolt tensioners, standard and self-locking hydraulic nuts for wind energy, oil & gas, and nuclear plants.
HHN-L Series Mechanical Lock-Ring Hydraulic Nuts
Ultra-high pressure 1500 Bar (150 MPa) mechanical lock-ring hydraulic nuts delivering 226 to 3864 kN pure axial bolt elongation. Eliminates thread galling and friction while integral knurled lock rings permanently preserve bolt pre-tension across M27 to M125 critical flanges.
HHN-M Series Heavy Industrial Mounting Nuts
The HHN-M Series 70-80 MPa hydraulic mounting nuts provide smooth, non-impact mounting and dismounting of bearings, flywheels, and marine propellers across M50 to Tr900. Operating at 700-800 Bar with up to 25 mm axial stroke, high hydraulic thrust pushes workpieces to exact position without damaging shafts or precision mating surfaces.
HST-S Series Single-Stage Topside Bolt Tensioners
High-precision 1500 Bar (150 MPa) single-stage topside hydraulic bolt tensioners delivering 282 to 3216 kN pure axial pre-tension. Engineered with interchangeable threaded pullers, twin quick-connect daisy-chain couplers, and dual-window support bridges for M24 to M100 critical flange closures.
HST-M Series Multi-Stage Compact Bolt Tensioners
Ultra-high-pressure 1500 Bar (150 MPa) multi-stage compact hydraulic bolt tensioners engineered for narrow radial clearance bolting. Features coaxial stacked double-cylinder architecture delivering massive pre-tensioning force for wind turbine foundation bolts, nuclear vessels, and confined flange rings.
Bolt Tensioners & Hydraulic Nuts — Series Overview
4 series in this category. Ratings below are taken from each product page; open a series for the full specification table.
- HHN-L Series Mechanical Lock-Ring Hydraulic NutsPRELOAD CAPACITY: 226 to 3864 kN · AXIAL STROKE: 6 to 20 mm Pure Axial Hydraulic Extension
- HHN-M Series Heavy Industrial Mounting NutsAXIAL HYDRAULIC STROKE: 5 mm to 25 mm Axial Travel · PRESSURE: 70-80 MPa
- HST-S Series Single-Stage Topside Bolt TensionersHYDRAULIC STROKE: 8 mm to 12 mm Axial Extension · PRESSURE: 1500 BAR HYDRAULIC TOPSIDE TENSIONINGRef. Enerpac GT1-GT4
- HST-M Series Multi-Stage Compact Bolt TensionersPRESSURE: 1500 BAR HYDRAULIC TOPSIDE TENSIONING · DRIVE MECHANISM: 80° Hexagon Drive Window with Tommy Bar Engagement
Enerpac®, SPX Flow®, Power Team®, Simplex®, Hytorc®, Holmatro® and other brand names are registered trademarks of their respective owners. HydraStark is an independent manufacturer and is not affiliated with, authorized or endorsed by these companies. OEM model numbers are listed for dimensional and specification reference only; please verify fit with our engineers before ordering.
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