Explore our foundational range of premium export-grade hardware, including standard-compliant self-drilling screws, wire rods, nails, and specialized washers manufactured to strict international specifications.
Unlike traditional friction-based lock washers that rely heavily on friction coefficient consistency at thread interfaces, wedge lock washers operate through tension rather than friction. The technology employs a unique multi-piece design configured with interlocking cams on the inner face and radial teeth on the exterior sides.
The mechanics are governed by a simple geometric principle: the cam angle (α) is designed to be greater than the thread pitch angle (β) of the mating bolt. When dynamic vibration attempts to loosen the bolted joint, the mating faces of the washers are forced to interact. Because the cam angle is greater than the thread pitch, the cam expansion forces the bolt to tension slightly, locking the joint firmly in place. This self-locking action ensures joint integrity is maintained even in high-stress, high-frequency vibratory environments.
Established in 2006, Sinsun Hardware has emerged as a premium manufacturer and global supplier of high-quality fasteners. Operating as Northern China's largest producer of Self-Tapping Screws, our robust operational footprint centers on a modern 30,000 sqm integrated facility.
This state-of-the-art complex contains dedicated cold heading blocks, advanced thermal treatment lines, and a 12,000 sqm smart warehouse holding an excess of 18,000 pallet capacity. Our logistics efficiency is demonstrated by our massive annual shipment capacity, consistently delivering over 8,500 containers to key industrial markets across the Middle East, Southeast Asia, South America, and Russia.
Driven by German-imported machinery and precision Taiwanese manufacturing techniques, our 20,000+ SKU hardware portfolio represents the ultimate in dimensional consistency and metallurgical integrity.
We exercise complete control over our manufacturing supply chain, ensuring that everything from raw wire rods to heat treatment and packing processes complies with strict global standards.
Equipped with over 200 German-imported multi-station cold heading machines producing 1,200+ pieces per minute per machine. This advanced setup guarantees exceptional dimensional tolerance levels and high volume consistency.
Sourced from industrial steel giants including XING TAI Steel and Ansteel Group (utilizing 10,000+ tons/year of high-grade C1022A, alloy, and stainless steels). Our facility carries out in-house spheroidizing annealing to refine grain structures.
We operate 4 dedicated in-house heat treatment systems with a daily throughput of 20 tons. Controlled carburizing and tempering cycles ensure wedge lock washers possess uniform hardness (HRC 46-52 for stainless steel types).
A history defined by technical progress, capacity expansion, and a dedication to zero-defect manufacturing.
Sinsun Hardware founded, establishing standard screw manufacturing operations in Northern China with local certifications.
Formal launch of our global export division, extending distribution networks across Southeast Asia, South America, and Eastern Europe.
Upgraded machinery lines with German-imported multi-station cold heading systems and specialized Taiwanese precision tooling.
Realized a 36,000-ton annual output with a 12,000 sqm smart automated warehouse facility. Developed specialized tension washer manufacturing blocks to support critical offshore, wind power, and railway projects.
Why procurement managers and structural engineers source high-reliability tension fasteners from China's leading factories.
Chinese fastener clusters provide instant access to upstream premium wire rod mills, specialized die makers, heat-treatment facilities, and surface treatment plants. This concentration minimizes domestic transit times and limits exposure to supply chain shocks.
Our surface treatment lines support next-generation non-electrolytic zinc flake coatings (such as Dacromet and Geomet) to comply with REACH and RoHS regulations. We ensure 1,000+ hours of salt spray resistance (ISO 9227) without the risk of hydrogen embrittlement.
Through advanced manufacturing processes and raw material sourcing contracts, Sinsun provides wedge lock washers that match western performance metrics (like Nord-Lock equivalents) at a lower overall production cost.
Wedge lock washers provide vital joint security across demanding industrial sectors where failure is not an option.
Wind turbine structures are exposed to continuous dynamic loads and severe weather. Wedge lock washers secure the high-tensile bolts on yaw bearings, blade hubs, and structural tower segments. In solar systems, they safeguard racking bolts from wind-induced vibration.
Railway joints experience severe vibration. The wedge lock design protects rail track components, switches, overhead line supports, and bogie frames on rolling stock, lowering maintenance frequency and prevent tracking failures.
Vibrating screens, crushers, and excavators generate continuous high-amplitude impact loads. Friction-based lock washers can fail under these conditions. Tension-based wedge washers maintain steady clamp force, preventing equipment downtime.
Steel bridge assemblies and structural frames handle dynamic traffic and wind loads. Using wedge lock washers ensures high-strength structural bolts remain securely tightened over their full service life.
Engineered to align with international fastener standards, guaranteeing material composition, hardness tolerances, and surface properties.
| Material Grade | Hardness Range | Corrosion Resistance | Applicable Standards | Recommended Applications |
|---|---|---|---|---|
| Steel (EN 1.7182 or equivalent alloy) | ≥ 465 HV10 (approx. HRC 46-48) | 1,000+ Hrs Salt Spray (Zinc Flake) | DIN 25201, ISO 10683 | General machinery, Automotive, Railway structures |
| Stainless Steel (SS316L / EN 1.4404) | ≥ 520 HV0.05 (Surface hardened) | Excellent acid & chloride immunity | DIN 25201, EN 10088 | Offshore engineering, Marine, Chemical processing |
| Duplex Stainless Steel (EN 1.4462) | ≥ 520 HV0.05 (Surface hardened) | Extreme seawater/chlorides immunity | DIN 25201-4 | Subsea installation, Heavy offshore platforms |
Discover how Sinsun custom engineered solutions resolved complex vibration and corrosion challenges on site.
A tier-1 automotive supplier needed a custom flange bolt and washer connection with exceptional vibration resistance and weight reduction.
Redesigned the joint setup utilizing a specialized alloy wedge washer system. Conducted complete Junker tests in our in-house facility.
Achieved 15% overall weight reduction, passed 2,000-hour dynamic vibration testing, and integrated into high-speed engine lines.
A marine engineering company required large-diameter bolts and locking washers with extreme corrosion resistance for a harsh saltwater environment.
Recommended and supplied a duplex stainless-steel grade (1.4462) washer set with specialized passivation coating. Provided full material heat traceability certificates.
Project completed with zero fastener failures, exceeding the client's lifecycle durability expectations in deep seawater environments.
Stay ahead of critical manufacturing shifts, compliance changes, and technological improvements in industrial fasteners.
Traditional hexavalent chromium (Cr6+) coatings are restricted globally. Leading Chinese factories have shifted to chromium-free zinc flake coatings, matching anti-corrosion properties while meeting modern environmental standards.
For high-strength bolts (Grade 10.9 and 12.9), acid pickling and electroplating introduce hydrogen embrittlement risks. Mechanical cleaning and zinc flake coatings eliminate this hazard, ensuring reliable performance under load.
To support modern high-speed assembly lines, manufacturers require zero-defect delivery. We use automated laser sorting machines to inspect dimensions, thickness, and profile tolerances on 100% of finished parts.
Find answers to common engineering questions about selecting, installing, and testing wedge lock washers.
We provide sourcing flexibility. While our production lines are optimized for high-volume wholesale, we support smaller prototype orders and test batches for engineering validation. Contact us with your project requirements.
Split washers and standard spring washers rely on spring force and friction. Over time, dynamic vibrations cause these friction joints to slip. Wedge lock washers use tension control instead. When joint movement occurs, the internal cams lock the bolt in place, preventing rotational loosening.
Yes. Since wedge lock washers work through tension rather than yielding steel, they can be reused. Before reinstallation, check the cams and external teeth for wear. Re-lubricating the mating surfaces is recommended to ensure even torque delivery.
For marine installations, we recommend surface-hardened SS316L or Duplex Stainless Steel washers. For high-tensile carbon steel, we provide non-electrolytic zinc flake coatings (such as Geomet) that survive over 1,000 hours in salt spray testing (ISO 9227).
They do not require special tools, but applying proper torque is essential to achieve correct preload. Because cam locking increases joint friction during tightening, we recommend checking our torque guides based on your bolt grade, size, and lubricant.
We use non-acid mechanical blasting to prepare metal surfaces, avoiding acid pickling. Our in-house laboratory conducts regular Junker tests (DIN 65151), hardness tests, and torque tension analysis to verify joint performance.
Complete your sourcing requirements with our certified selection of industrial fasteners, mesh fencing, concrete anchor screws, and heavy-duty structural parts.
Partner with China's dedicated fastener manufacturer. Our engineering and logistics teams are ready to assist with custom quotes, testing reports, and bulk volume pricing within 48 hours.
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