ITH Roundnuts RMS / RMZ

The stress-optimized design of ITH Roundnuts RMS and RMZ achieves higher bolt pre-tensioning forces (up to 40% more) than with comparable  DIN hexagon nuts which is confirmed by scientific studies. The design is certified by German Lloyds. ITH RMS / RMZ are built to work with ITH Bolt Tensioning Cylinders from the range of M24 to M100 (7/8” to 4”). The ITH Roundnuts are produced in:

  • ITH RMS : ITH round nut hexagon version
  • ITH RMZ: ITH round nut two-flat version

Even customized applications are possible. Both versions are also available in a flat version “ITH RMS / RMZ slim line”.

ITH Round nuts can achieve up to 40% higher preloads

  • which allows the designer to reduce the fastener sizes  which saves costs
  • Higher bolt spacing n: The flange diameter can be reduced which saves costs

Certified design

  • by German Lloyds
  • Designed for use with ITH Bolt Tensioning Cylinders


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