Nord-Lock Original Washers

Nord-Lock Original Washers

Nord-Lock Group About Nord-Lock Products Original Washers Technical Guide

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.

Joint Guide

Nord-Lock_Joint-Guide_Washer_Tapped-Holes.jpg

Tapped holes
Nord-Lock washers safely lock the bolt against the underlying surface.

Counterbores
The outer diameter of regular Nord-Lock washers is designed for counterbore holes according to DIN 974, i.e. the washers fit under the head of standard bolts.

Through-holes
As for all locking washers, through-holes require two pairs of Nord-Lock washers – one pair for securing the bolt and a second pair for securing the nut. Turn both fasteners in order to close the cams on both washer pairs before tightening to minimize settlements. Keep the nut secure while tightening the bolt.

Stud bolts
Nord-Lock washers safely lock the nut on stud bolts and eliminate the need for adhesives.

Applications with large / slotted holes or soft underlying surfaces
To optimize the load distribution for applications with large / slotted holes or with soft underlying surface, use a flanged nut / bolt together with Nord-Lock “SP” washers with enlarged outer diameter.

Designs where Nord-Lock washers are not recommended

  • Mating surfaces that are not locked in place (see left figure)
  • Mating surfaces harder than the washers
  • Very soft mating surface, e.g. wood, plastic
  • Applications with extremely large settlements
  • Non-preloaded joints

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Customer success stories

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A Wind-Win Situation Wind turbine towers are designed to flex and bend, which helps them dissipate the significant forces being exerted upon them. However, this had been causing dangerous failures in the bolts. Read More
Securing Giant Satellite Antenna Radomes in Antarctica Antarctica is one of the coldest and windiest places on earth. These conditions put an extreme amount of pressure on bolted connections to be secured properly. Read More
A Simple Solution for an Advanced Machine With the world’s appetite for LCD displays seemingly insatiable, Hyundai Robotics’ LCD handling machines are in high demand from LCD manufacturers. Read More
When the going gets tough Off-road vehicles are built to handle what would break most cars and trucks. Whether driving through mud or racing up a mountainside, these vehicles need state-of-the-art technology to stay in top condition. Read More
Pushing the boundaries of express trains The central Japan railway Company (JR Central) operates the Shinkansen superexpress bullet trains that connect Tokyo and Osaka – Japan’s two biggest cities. Read More
Customized washers keep KTM motorcycles in the race | Nord-Lock Group Pick any of the world’s most exciting motor races and you will find the orange motorcycles by KTM, Europe’s largest manufacturer, among the top contenders. Read More
Washers reduce costs in propeller assembly Mecklenburger Metallguss GmbH, a world leader in the production of propellers for large container ships chose Nord-Lock as the new standard for all bolted joint applications Read More
SpaceX competition winners chose wedge-locking washers In 2015, Elon Musk, the billionaire behind the futuristic transport technology companies Tesla and SpaceX, launched the Hyperloop Pod Competition. Read More
Washers triple-protect nuclear transports Daher Nuclear Technologies GmbH, located in Hanau close to Frankfurt am Main, Germany, develops containers for transportation of radioactive substances. For obvious reasons, these containers must b... Read More
Cheaper but Better Solution for Tractors With Washers Early in 2017, when Hattat Traktör was testing a new tractor model, they realized that the joints on the air compressor–engine connection bracket were loosening because of vibration. Read More
Focus on security in windy and vibrating environment Dutch company Akkadia manufactures specialist CCTV systems for demanding situations in various industries. Its cameras can be found everywhere, from offshore, to polar regions and deserts. Read More
Nord-Lock Group keeps the railway industry on track Nord-Lock wedge-locking washers are used in all safety-related areas of the railway industry, such as bogies, coupling devices, brake systems, rail dampers. Read More
Washers keep airplanes in the air Look up into the sky in the coastal city of Miri, in north-eastern Sarawak, Malaysia, and you may see Nord-Lock washers in action: inside a radio-controlled aircraft. These hobby airplanes are sold by Byond Horizon, a business that otherwise uses drones to take aerial photos and videos for companies. Read More
Renovating Nuremberg’s metro – without affecting the timetable Renovating an underground railway system without weeks of construction and chaos caused by delays and diversions was previously unheard of. Read More
Extended temperature range for usage of Nord-Lock steel washers Nord-Lock steel washers have been approved for temperatures down to -50°C by an independent test institute Swerea Kimab and TÜV. Read More
Green technology for sustainable land clearing Mulching machines are exposed to extreme vibration. Extending their life cycle and sharpness of the teeth is vital for sustainable land clearing. Read More
Washers safeguard transport safety To avoid accidents that would put people and the environment in harms way, it is crucial that the transport of liquids is managed safely and efficiently. Read More
Taking wind energy to new depths Offshore wind turbines are an increasingly common sight as the world moves towards more sustainable forms of energy production. Read More
Innovative wind turbine maker gets peace of mind with Nord-Lock Quality and durability are Eastern Wind Power’s top priorities for its 50kW vertical axis wind turbines. Read More
China: Opportunities on the coal market Xi’an Coal Mining Machinery has approved Nord-Lock washers and Superbolt tensioners as specialised components for its shearers and roadheaders. Read More
Safety secures trust For more than 30 years, unsurpassed safety has been synonymous with the Nord-Lock Group. Read More
Powerful circles Nord-Lock enlarged external diameter wedge locking washers make the connections on a circular storage unit for lignite absolutely secure. Read More
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Rallying for safe bolted joints Motor sports are not easy on the cars. High speed, torque, vibrations, g-forces and hard knocks put enormous strain on the cars and their components. Read More

Nord-Lock product range

Nord-Lock wedge-locking washers prevent bolt loosening Nord-Lock Washers Wedge-locking security for bolted joints subjected to extreme vibration and dynamic loads Read More
Nord-Lock X-series washer combines wedge-locking with an exceptional spring effect to secure against multiple bolt loosening factors Nord-Lock X-series Washers Maximum security for critical bolted joints exposed to spontaneous bolt loosening and slackening Read More
Nord-Lock steel construction washers are designed for bolted connections in steel structures Nord-Lock Steel Construction Washers Optimal contact between bolts and washers used in steel contruction applications, including HV and HR sets Read More
Nord-Lock wheel nuts safely secure wheels on on-road and off-road heavy vehicles Nord-Lock Wheel Nuts High clamping force that eliminates wheel loosening on heavy vehicles operating under extreme conditions Read More
Combi bolt washers from Nord-Lock are specifically designed to be captivated on a bolt, known as SEMS Nord-Lock Combi Bolt Washers Additional layer of security for applications through permanent attachment to bolt (SEMS) Read More
Customized washers from Nord-Lock can include special materials, measurements, sizes, coatings or changes in geometry Nord-Lock Customized Solutions Custom designed bolting solutions for your unique application requirements Read More

Secure connections

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