Nord-Lock created the original wedge-locking technology that secures bolted joints, even when exposed to severe vibration and dynamic loads. It is impossible for our products to loosen unintentionally due to the wedge created underneath the bolt head and nut.

X-series washers

Bolted joints fail for two reasons - spontaneous bolt loosening and slackening. Nord-Lock multifunctional wedge-locking technology tackles both, offering you total security for those situations when there can be no compromise.

This product is the optimum choice when you have both vibrations and applications with risk of slackening, such as applications with short clamp length, multiple clamped parts, gaskets, soft metals, plastic composites, coatings and thermal cycling.

Nord-Lock X-series steel washer promises the highest corrosion resistance in the market, it is tested at least 1,000 hours in the Neutral Salt Spray Test (According to ISO 9227) .





  • Prevents bolt loosening caused by vibration and dynamic loads
  • Reduces slackening and compensates against loss of preload
  • One solution to cover multiple design challenges
  • Accurate preload with defined and uniform friction
  • Reusable and reduces number of parts in stock
  • Quick and easy assembly and disassembly
  • Increases operational reliability while reducing the risk of unplanned production stops, accidents, and warranty claims

Testing & Certification

Nord-Lock X-series washers have been rigorously tested and approved by independent institutes as well as certification authorities.

Nord-Lock X-series performs better than alternatives when compensating slackening in static conditions, and when preventing rotation of the fastener when the joint is exposed to vibration in the dynamic phase.


Customer success stories