Your result

Locking ability

5 out of 5


4 out of 5

Worker safety

4 out of 5

Initial cost


Lifetime cost


How did we calculate?

How effective are Nord-Lock wedge-locking washers against bolt loosening?

The wedge-locking principle uses tension rather than friction to secure the bolted joint in place. All bolted connections will start to loosen during its life cycle. Nord-Lock wedge-locking principle does not only prevent loosening but actually stretches the bolt and prohibits further rotation.

Wedge-locking washers require a higher than average upfront cost than other fasteners, however, they are also the most suitable for critical bolted joints facing vibration and dynamic loads and can be reused – leading to lower long-term costs.

Read the full version in the eBook "Why do bolts loosen?"
(A comparison between common bolt securing options)
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Which bolt locking product should I use?

  • Pros & Cons of different bolt locking methods
  • A Guidance for Selection, to help you decide which product to use in your applications

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The biggest challenge for a bolted joint, causing it to lose preload and fail, is spontaneous loosening often caused by vibrationsThis Junker test shows all 5 nuts stays safely secured! A straight line in the graph indicates a success. Read more about the Junker Test.

Talk about bolting challenges with us!

Do you need guidance choosing the best bolt securing solution for your application? Let our bolting experts guide you.

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