Safe bolted connections Constructions Applications | Nord-Lock® - Nord-Lock Group

Applications

Cranes and crane structure Secure crane components to prevent loosening and ensure operational safety.

Conveyor technology Prevent bolts from loosening under vibration in conveyor systems for reliable and continuous operation.

Noise barriers Stabilize structural joints in noise barriers under wind loads and vibration to ensure durability and performance.

Bridges Ensure joint integrity in bridges under high-stress conditions for long-lasting structural stability.

Heavy steel structures Reinforce critical connections in heavy steel structures to prevent loosening under extreme loads.

Facades Secure façade elements to prevent loosening and ensure long-term stability under environmental stress.

Earthquake areas Prevent bolt loosening in seismic zones to ensure stability and safety during earthquakes.

Towers and masts Maintain stability in towers and masts by preventing loosening caused by Oscillation excitation.

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Why Nord-Lock washers

10 reasons that speak for Nord-Lock

Dynamic loads: Alternating or shock loads, vibration, temperature

Standards recommend or prescribe locking elements

Preload alone is no guarantee of adequate locking function

Other securing methods are ineffective (e.g. double nut, thread punching, pal nut, etc.)

Maintains the preload (design principle of a bolt)

Prevents the bolting components from falling apart

Conform securing element (ETA, abZ, EBA)

Reduction of maintenance activities and costs

Easy to use (replace flat washer with Nord-Lock)

Lifetime warranty on the securing function

Frequently asked questions

How do I keep bolts from loosening in steel structures?

Use Nord-Lock steel construction washers. They use Nord-Lock’s wedge-locking technology, which keeps the bolt in place even under heavy vibration, movement, or dynamic loads. The connection stays secure without retightening.

We use HV/HR bolted connections — how can we avoid preload loss and installation issues?

Nord-Lock steel construction washers prevent preload loss, reduce installation errors, and eliminate the need for maintenance. They provide reliable performance where double nuts, pal nuts, or retightening often fail.

Am I allowed to use Nord‑Lock steel construction washers in EN 1090 projects?

Yes. Nord-Lock steel construction washers are designed specifically for EN 1090 and EN 14399 HV/HR bolt assemblies and can be used confidently in preloaded structural joints.

How difficult is it to install Nord-Lock steel construction washers on site?

Very easy. They require no special tools, ensure consistent preload, and are easy to install even in challenging on‑site conditions.

When should I choose Nord-Lock steel construction washers instead of standard Nord-Lock washers?

Use Nord-Lock steel construction washers when working with HV/HR bolts in structural steel applications which are supposed to dynamic loads or movements.

Which washer size fits my HV/HR bolts?

Simply match the washer size to your HV/HR bolt size (M12–M36). The Nord-Lock Steel Construction Dimension Guide makes a selection straightforward. Consider a Nord-Lock washer underneath the bolt head and the nut.

Are Nord-Lock steel construction washers tested for extreme loads and vibration?

Yes. They are verified through Junker vibration tests and EN 14399 performance criteria, ensuring reliability under wind, dynamic forces, and temperature changes.

Are Nord-Lock steel construction washers CE-marked?

Yes. Nord-Lock steel construction washers are CE-marked as part of the EN 1090 certification framework. This means they are approved for use in loadbearing steel structures and meet the performance and safety requirements defined for construction products in the EU and UK markets, marked as part of the EN 1090 certification framework. Read more about CE-marking here.