Welcome: JIA LI INDUSTRIAL (H.K.) LIMITED
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As the originator of global wedge anti-loosening technology, NORD-LOCK from Sweden has focused on industrial anti-loosening solutions for decades. It is the designated lock washer brand for heavy export projects including wind power, rail transit, marine engineering and mining machinery. With exclusive patented wedge self-locking teeth structure, it solves bolt loosening issues under high-strength alternating vibration. Fastener_hk is an official authorized agent in Hong Kong supplying 100% genuine NORD-lock washers.
| Comparison Item | Genuine NORD-LOCK | Domestic Counterfeit Wedge Washers |
| Base Material | Special quenched alloy steel with uniform overall hardening | Ordinary carbon steel with simple zinc plating, no integral quenching |
| Vibration Resistance Level | Up to 10G alternating impact vibration, stable long-term performance | Only within 3G mild vibration, locking force drops sharply after 3 months continuous operation |
| Operating Temperature Range | -50℃ ~ 150℃, no performance loss under extreme temperature | -20℃ ~ 80℃, tooth surface softens and slips under high temperature |
| Tooth Machining Precision | CNC precision milled wedge teeth with uniform fitting gap | Stamped teeth with uneven depth, resulting in fitting clearance |
| Reusability | Single use only, tooth abrasion after disassembly prohibits re-installation | Can be disassembled repeatedly but loses anti-loosening function quickly |
| Official Supporting Documents | Complete CO certificate, material test report, RoHS certificate | No original official inspection or origin documents, cannot pass customs & factory audit overseas |
Ordinary spring washers rely on elastic deformation to provide preload, which fades rapidly after long-term vibration fatigue, leading to loose nuts. A pair of interlocked NORD-LOCK wedge washers feature reverse inclined tooth surfaces. Tiny displacement and vibration make two washers slide against each other and generate reverse locking force automatically. The stronger the vibration, the tighter the locking, fundamentally preventing bolt loosening mechanically.
1. Onshore & Offshore Wind Power: Tower flanges, nacelle frames, blade connections; mandatory brand for overseas wind farm projects; 2. Rail Transit: High-speed train chassis, track equipment and carriage suspension fasteners to withstand continuous driving impact; 3. Marine & Offshore Engineering: Deck steel structures, marine engine brackets, resistant to seawater corrosion and wave alternating shock; 4. Mining Construction Machinery: Tunneling machines, loader chassis for heavy load impact, eliminating safety hazards of falling bolts during operation.
1. Pair assembly rule: Two washers must be installed as a set with wedge tooth faces attached together; single piece or reversed installation will disable self-locking function completely; 2. Torque control rule: Increase tightening torque by 15% above standard bolt torque to ensure full tooth surface contact and fitting; 3. Matching taboo: Do not stack with nylon lock nuts or standard spring washers, multiple anti-loosening structures interfere and weaken wedge locking performance; 4. Moisture-proof storage: Store original washers in sealed vapor phase anti-rust bags; conduct regular inspection in Hong Kong warehouse during rainy seasons to avoid surface flash rust affecting assembly precision; 5. Procurement risk control: Low-price goods without official documents are counterfeits. Domestic imitation substitution is forbidden if drawings specify NORD-LOCK brand, which will lead to full batch order rejection by overseas buyers.
Contact: Sunrise
Phone: 13928071304
Tel: +86-0756-8586520
Email: sales@zhjiali.com
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