Nord-Lock Group About Nord-Lock Products Combi Bolt Washers

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.

Combi bolt washers

Nord-Lock combi bolt washers are specifically designed to be permanently attached to a bolt (SEMS), providing an additional layer of security to applications.

The standard range of Nord-Lock combi bolt washers consists of NL5 - NL12 in steel material. Complete combi bolts, including Nord-Lock combi bolt washers, are offered in co-operation with a local bolt manufacturer. 

 

Proven wedge-locking technology

The washers are developed based on our proven wedge-locking technology but have a reduced inner diameter preventing them from falling off the bolt after the thread is added.

Advantages

  • Ensures faster product assembly, thanks to pre-assembled parts
  • Decreases failures related to human error, incorrect mounting or forgetting to put on the washers
  • Facilitates product assembly of very small sizes
  • Allows maintenance and repairs in areas that are difficult to reach or of limited access
  • Facilitates inventory and logistical savings due to reduced number of items
  • Faster and easier disassembly, as loose washers can be difficult to remove, especially from counter bore holes


Testing & Certification

Nord-Lock combi bolt washers have been rigorously tested and approved by the Nord-Lock engineering team. The standard range of Nord-Lock combi bolt washers are ready to be shipped to you for testing/evaluation. Combi bolt washers in other sizes, metric and UNC, with standard diameter or enlarged outer diameter (sp) as well as washers in other materials are offered upon request. 

Customer success stories

Customer Cases Opening new doors Since its completion last year, the Burj Khalifa skyscraper in Dubai has already broken numerous world records. Apart from being the tallest structure ever built, it also includes the world’s highe... Read more
Customer Cases Good vibrations The huge machines made by Metso Minerals France are a mechanical nightmare. Whereas vibrations are usually eliminated from machines, the very raison d’être of the Metso machines is to vibrate as mu... Read more
Customer Cases Built for Speed The latest version of Japan Railway’s famous Shinkansen, known around the world as the Bullet Train, reaches speeds of 300 kilometres per hour. Read more
Customer Cases 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
Customer Cases Ensuring Safety in Car Racing The Korean Formula Student Competition (KSAE) allows engineering students to design and race their own cars - putting their engineering skills to the test in a real-life environment. Read more
Customer Cases Right on target For over thirty years, Biathlon Target System Kurvinen has been a world-class pioneer in biathlon target and range systems and has exported its products to over 30 countries. During a competition, Kurvinen targets will be continuously shot at and subjected to thousands of hits. Read more
Customer Cases What a lift! When enormous 35-tonne containers are being maneuvered into place at the world’s major ports equipment reliability is paramount. The giant cranes must work under tight constraints and with exacting precision.That’s why Nord-Lock and crane spreader manufacturer Bromma are the perfect match. Read more
Customer Cases 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
Customer Cases 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
Customer Cases Tough trial puts wheel nuts to the test “We’ve been in some pretty tough situations but we haven’t had any wheels come loose since we fitted Nord-Lock wheel nuts.” - proven at the European truck trial Read more
Customer Cases Competing in the world’s most dangerous race In January 2013, the legendary Dakar Rally started in Peru for the first time and end in Chile, having crossed the Andes into Argentina. Read more
Customer Cases Propelled upwards Sensenich has been manufacturing aircraft propellers since 1932, and as the industry has grown and developed, it has continued to develop new propellers to match. Read more
Customer Cases 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
Customer Cases 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
Customer Cases Conquering the Seas Mitsui recently began using Nord-Lock components in their marine diesel engines. Because Nord-Lock components are comparatively light and small, they are effective in making assembly and tightening quicker and safer especially in poorly-accessible or confined places. Read more
Customer Cases Built for Speed The world’s fastest conventional trains run in France, and not just to break the April 2007 record of 574.8 km/h (under test conditions with a shortened train). The TGV regularly runs at 320 km/h and at those kinds of speeds it is absolutely vital that nothing falls off the rolling-stock to derail the train. This is where Nord-Lock comes into the picture. Read more
Customer Cases Putting the X-series to the test The Challenge Wam Metals is a manufacturer and supplier of a wide range of specialized non-ferrous and ferrous components, servicing both the local South African and the international markets. The... Read more
Customer Cases 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
Customer Cases Eliminating bolt loosening for good At power plants across the world, gas turbines are becoming increasingly vital to the world’s power supplies. Mitsubishi Heavy Industries currently manufacture ultra-large gas turbines, which are more than six metres tall and over 16 metres long. Read more
Customer Cases The power of the sun: transformed by Siemens turbines Assembling an industrial-sized turbine requires acres of room. It also requires thousands of bolts and washers to be assembled and tightened to guarantee a service life of the product, which in the solar energy, biomass, oil and gas sectors, is typically upwards of 30 years. Read more
Customer Cases 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
Customer Cases You’re gonna dig this A kilometer below the churning waves, more than a thousand pairs of Nord-Lock washers are used throughout the plough application where clamp load must be maintained in the bolted joints. Read more
Customer Cases Plunging to New Depths In its quest to be the world’s leading service provider for the exploration and extraction of natural resources, Fugro has had to overcome all the world’s natural barriers. With its world class ROVs (remotely operated vehicles) even the deepest oceans are within its reach. Read more
Customer Cases Tunnel vision Twenty meters beneath the streets of Malmö, Sweden, the new underground section of the city’s central station is gradually taking shape. Read more
Customer Cases Underground operations Sandvik Mining and Construction was having problems with the bolts clamping the cutting tools to the reaming head; they were sometimes coming loose under the extreme vibrations, loads and torque involved. Replacing the bolts which vibrated loose was a costly, time consuming and often dangerous job. Read more
Customer Cases Tough machines for a tough industry In the mining industry, every minute of downtime results in lost income, and one loose fastener can cost a small fortune. This is why Joy Global doesn’t compromise when it comes to bolt security. Read more
Customer Cases Faster transport for heavy machinery Excavators are a vital piece of machinery for any mine, but for all their horsepower, they are incredibly slow and cumbersome to move. In fact, 15 percent of their time is spent travelling, and this enforced downtime means lost income. Read more
Customer Cases Powerful circles Nord-Lock enlarged external diameter wedge locking washers make the connections on a circular storage unit for lignite absolutely secure. Read more
Customer Cases 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
Customer Cases Powering the industry Electric motors are often called the “workhorses of the industry”, running all kinds of machinery ranging from escalators and ski lifts to huge port cranes. Heavy mechanical movements require a reliable drive that ensures the best torque, speed, and motor efficiency. This reliability often starts with the right bolt securing system. Read more

Solutions for your industry

Power Generation
Railway
Machine Building
Oil & Gas
Construction
Manufacturing & Processing

Nord-Lock product range

Nord-Lock wedge-locking washers prevent bolt loosening Nord-Lock 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 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 NORD-LOCK STEEL® CONSTRUCTION WASHERS Optimal contact between bolts and washers used in steel construction applications, including HV and HR sets. Read more
Combi bolt washers from Nord-Lock are specifically designed to be captivated on a bolt, known as SEMS Nord-Lock 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 Nord-Lock Customized Solutions Custom designed bolting solutions for your unique application requirements Read more

Secure connections

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