Nord-Lock wedge-locking washers

What is a Nord-Lock washer, and how effective are they against bolt loosening?

Your result

Locking ability	5 out of 5
Reusability	4 out of 5
Worker safety	4 out of 5
Initial cost	High
Lifetime cost	Low

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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LOOKING TO ELIMINATE NUT AND BOLT LOOSENING?

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