TREP® is designed as an anti-loosening security system for all mechanical bolting connection, which consists of 3 or 4 interdependent smooth tapered spring washers with a metal insert. As a safety element, disc spring assemblies maintains constant tension and clamping force in the joint. Even though slight relaxation may occur, the elastic properties of TREP® ensures that the system can withstand loosening in high-stress applications where residual tension in the bolt is of vital importance, or in another words, completely secure and reliable fastening, no concern about the problem of vibration or loosening.



For soft surfaces such as aluminum, copper or brass, the special solution TREP plus® distributes the clamping force over a larger surface area without slipping.



  • Applications
  • Features
TREP Disc spring assemblies
  • Electrical equipment
  • Shipbuilding
  • Railway
  • Heavy vehicles
  • Other machines subject to high vibrations

TREP Disc spring assemblies
  • Resistance to loosening / unscrewing
  • Retains the tension and clamping force
  • Better durability, fatigue life test more than 1,000,000 cycles
  • Ability to adapt thermal expansion, high temperature resistance
  • Corrosion resistance
  • Easy assembly saves working time

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