Nord-Lock Washers

Nord-Lock is a world leader in bolt securing systems uses geometry to safely lock bolted joints in critical applications.

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Nord-Lock washers secure bolted joints with tension instead of friction. The system is comprised of a pair of washers with cams on one side and radial teeth on the opposite side. The cam angle 'a' is greater than the thread pitch 'B' a wedge effect is created by the cams, preventing the bolt from rotating loose.

Superbolt mt style mechanical tensioners
Nord-Lock washers are a proven, safe, bolting system. Securing bolted joints exposed to severe vibration and dynamic loads.

Product Benefits

  • Maintains high clamp load and thereby ensures the function of the joint
  • Quick and easy to install and remove with standard tools
  • Locking function not affected by lubrication
  • Defined and uniform friction conditions which result in a more accurate preload
  • Same temperature characteristics as standard bolt / nut
  • Reusable – in addition, Nord-Lock washers do not affect the reusability of fasteners
  • The washers are hardened and can support and distribute great loads
  • Washers with enlarged outer diameter available for flanged bolts / nuts
  • High corrosion resistance
  • Can be used with fasteners up to grade 12.9 (ASTM A574)
  • Reliable locking, even for joints with short clamp length
  • Secures fasteners at both high and low preloads
  • No retightening needed • Verifiable locking function
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