DNS Range

The Hi-Force DNS range of double acting, hydraulic nut splitters offers a choice of 2 models suitable for splitting nuts of across flats (AF) sizes from 2.15/16” to 5.3/8” (75 mm to 136 mm). Both models are 10000 psi maximum working pressure and feature a double acting hydraulic piston for easy extension and retraction of the toughened steel splitting blade. Hi-Force DNS range hydraulic nut splitters are easy to set up and capable of safely splitting nuts quickly without any sparks, flames or flying debris usually associated with cutting torches. 

  • Nut AF sizes from 2 15/16" to 5 3/8"
  • Bolt sizes from 1 7/8" to 3 1/2"
  • Working pressure 10000 psi
  • Double acting hydraulic piston for easy extension and retraction of the blade
  • Angled body design for increased clearance on flanges and flat surfaces
  • High quality steel construction
  • Pressure relief valve on annulus side
  • Suitable for splitting nuts up to RC44 hardness
  • Designed to fit on most API and ANSI flanges
  • Steel linkage keeps blade cutting edge parallel to the nut throughout the splitting process

Double acting nut splitters
Model Number Capacity tons Oil capacity in3 Hexagon AF Sizes Stud Bolt Thread Sizes Weight lbs
inch mm imperial metric
DNS404 131.8 48.56 2 15/16" - 4 1/4" 75 - 105 1 7/8" - 2 3/4" M48 - M72 110.2
DNS506 224.2 92.11 4 1/4" - 5 3/8" 105 - 136 2 3/4" - 3 1/2" M72 - M95 211.6

Note: The DNS nut splitters are for use on heavy duty nuts, where the nut height is equal to or greater than two-thirds of the blade length of the tool being used.


Model Number Dimensions in inch
A B C D E F
DNS404 14.93 7.56 3.92 5.14 7.21 1.34
DNS506 17.77 9.46 5.52 6.6 9.26 1.62

Note: Please check dimension 'F' to confirm the tool will fit in the space between the edge of the nut and the neck of the flange.