Nord-Lock washers
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ENGLISH • METRIC Nord-Lock washers The original wedge-locking solution

Since the Nord-Lock Group began operations in 1982 we have focused on providing the world’s most effective bolt securing system. Our products are based on leading wedgelocking technology and are recognized for their ability to safely secure bolted joints exposed to severe vibration and dynamic loads. When you choose Nord-Lock you do not only choose a supplier or a manufacturer, you also benefit from a partner­ hip with an expert in bolted joint technology. Our s global team of sales engineers work with our clients to solve bolt securing problems in the most demanding applications. Nord-Lock...

Over the years, Nord-Lock washers have been rigorously tested and approved by independent institutes as well as certification authorities. Proven in Junker vibration test The Junker test, according to DIN 65151, is considered the most severe vibration test for bolted connections. During the test, the joint is exposed to transverse movements underneath the bolt head / nut, while the clamping force is continuously measured. Proven according to NASM impact & vibration test The National Aerospace test, according to NASM 1312-7, is a test method originally developed by the U.S. military to test...

Widely used & globally approved Nord-Lock washers are high end products with documented success in many industries. Our washers are approved by several industry standards and specified by numerous international companies. Industries where Nord-Lock washers are used Nord-Lock washers are used in industries such as: energy, transportation, offshore, mining and quarrying, construction and bridge building, manufacturing and processing, ship building, forestry and agriculture, heavy vehicles, and military. The number of industries that use Nord-Lock washers is continuously growing. Often joints...

The key to efficient & secure operations Nord-Lock washers provide more than just a safe locking function, using our washers also improves the general performance of a bolted joint. Product benefits • Maintains high clamp load and thereby ensures the function of the joint Life Cycle Profitability Over the operational life cycle, Nord-Lock products give increased operational reliability and lower maintenance costs while significantly reducing the risks of production stops, accidents and warranty claims. We help you examine all cost factors related to bolted joints. • Quick and easy to...

Using Nord-Lock washers Nord-Lock washers are easy and effective to use while ensuring structural security for applications exposed to vibration and dynamic loads. Possible to verify the locking function Installing the washers The pre-assembled washers are installed in pairs, cam face to cam face. Nord-Lock recommends lubrication when possible. Tightening Tighten Nord-Lock washers with standard tools according to the guidelines (on page 9-11). Tightening guidelines for other bolt grades are available through your Nord-Lock representative. Untightening Untightening Nord-Lock washers is as...

Nord-Lock washer material / type guide Application parameter Steel washers Stainless steel (ss) washers INCONEL® / HASTELLOY® C-276 washers General steel applications General stainless steel applications. Non chlorine / acid environments General salt water applications, pumps, chloride applications, heat exchangers, nuclear, desalination, food processing & medical equipment General acidic environments, process and chemical industry, evaporators, offshore downhole tooling Applications with high temperatures, gas turbines, turbo charges, incinerators Available for bolt sizes M3-M39 available...

Nord-Lock steel washers EN 1.7182 or equivalent, zinc flake coating (Delta Protekt®), through hardened Dimension chart Washer size Bolt size Metric Approx. weight kg     100 pairs / NL3    L42 –N T ± 0,25 mm NL45    L130 –N T ± 0,75 mm Note that washers with thickness 6,6 mm have a thickness tolerance +0,0 / -0,5 mm • Please consult our website for current dimensions and 2D / 3D CAD models: www.nord-lock.com/cad Nord-Lock steel washers of sizes 3-42 and with zinc flake coating are standard stock items, yet subject to prior sale.

Torque guidelines Nord-Lock steel washers with zinc flake coating (Delta Protekt®) Nord-Lock steel washers with electro zinc plated bolt grade 8.8 Cu/C paste, GF =75% 0 0 µth =  ,13, µh =  ,18 Bolt size Nord-Lock steel washers with non-plated bolt grade 10.9 Oil, G F =71% =0 0 µth    ,15, µh =  ,15 Torque guidelines for other bolt grades are available through your local Nord-Lock representative. Thread friction coefficients have theoretical values but are verified through testing. Under head friction coefficients have been established by tests. Nord-Lock steel washers with non-plated bolt...

Nord-Lock stainless steel washers EN 1.4404 (AISI 316L) or equivalent, surface hardened EN 1.4404 is an austenitic chromium-nickel stainless steel containing molybdenum. This stainless steel also has extra low carbon content in order to reduce the risk of chromium-carbide precipitation. EN 1.4404 is one of the most commonly used stainless steel grades and Nord-Lock washers made of EN 1.4404 are suitable for most applications where no chlorides or acids are present. Dimension chart Washer size Bolt size Metric Approx. weight kg /   00 pairs 1 Nord-Lock washers made of stainless steel are...

Nord-Lock 254 SMO® washers EN 1.4547 or equivalent, surface hardened 254 SMO® is a high performance austenitic stainless steel (according to EN 1.4547) with greater mechanical strength and resistance against corrosion than most austenitic stainless steel grades. The material is resilient against pitting and crevice corrosion due to high contents of chromium, nickel, molybdenum and nitrogen. Nord-Lock 254 SMO® washers are specially designed for chloride rich processes and salt water solutions / atmospheres, i.e. environments where stainless steel washers made of EN 1.4404 are not suitable....