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About Nord-Lock Washers
STEEL WEDGE-LOCK WASHERS
Nord-Lock wedge-locking washers utilise tension instead of friction in order to secure bolted joints exposed to severe vibration and dynamic loads suitable for the most demanding industries.
Delta Protekt® HIGHEST CORROSION RESISTANCE TESTED
Nord-Lock steel washer promises the highest corrosion resistance on the market. The washers have been tested with at least 1,000 hours in the Neutral Salt Spray Test*, ensuring optimum performance over time, even in the most extreme environments and dynamic loads.
WHAT MAKES NORD-LOCK WASHERS WORK SO WELL?
The Nord-Lock solution is composed of a pair of wedge-locking washers. Each washer has cams on one side and serrations on the other. When tightened, the serrations embed into the mating surfaces. As the cam angle (α) is greater than the thread pitch (β), a wedge effect is created, so movement only occurs across the cams, maintaining preload and preventing loosening.
BENEFITS OF NORD-LOCK WEDGE LOCK WASHERS
- Secures bolted joints exposed to severe vibration and dynamic loads
- Available in a wide range of materials to suit use in general steel and stainless steel applications
- Available in a wide range of materials to suit use in corrosive, acidic and high-temperature environments
- Locking function is not affected by lubrication
- Achieves accurate preload with defined and uniform friction
- Available in a wide range of sizes (metric and imperial)
- Designed for bolts up to and including property class 12.9 (steel) and A4-80 (stainless steel)
- High corrosion resistance
- High reusability potential
- Custom sizes available upon request
WORKING IN ANY INDUSTRY
Nord-Lock wedge-locking washers provide superior integrity by utilising tension rather than friction to stabilise bolted joints against severe vibration and dynamic loads. This engineering-led solution increases operational reliability and lowers maintenance costs over the life cycle, significantly reducing the risks of production downtime or structural failure. Designed to handle everything from property class 12.9 steel to A4-80 stainless steel, these washers maintain accurate preload across a range of corrosive, acidic, and high-temperature environments. From subsea depths to aerospace and critical infrastructure, Nord-Lock is the global standard where safety is non-negotiable.
CERTIFICATES AND ACCREDITATION
Our washers have been rigorously tested and approved by independent institutes and authorities, ensuring that our washers meet the most stringent standards and safety requirements.
Among these are the Junker test, the most rigorous method for testing bolted joint, where the joint gets exposed to transverse displacement, while the preload is continuously measured. Nord-Lock washers consistently outperform the competition in this test.
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