Double Stack Self-Locking Washer – Premium Anti-Loosing Fastening Solution
Product Overview
The double stack self-locking washer is an advanced anti-loosening fastener designed for high-vibration and high-impact environments. Its unique dual-layer interlocking structure provides continuous locking force through elastic deformation, effectively preventing bolt and nut loosening in demanding applications.
Compliant with DIN/ISO Standards Widely Used in Automotive, Rail, Construction, and Power Industries Superior Performance Under Extreme Conditions
Key Advantages
1. Dual-Locking Mechanism
Interlocking Sawtooth Design – Upper and lower layers engage to create bidirectional locking force (radial + axial).
Enhanced Security – Prevents loosening even under severe vibration.
2. Superior Vibration Resistance
Tested to ISO 16130 Standard – Withstands 10,000+ high-frequency vibrations without failure.
3. Reusable & Durable
Special Heat Treatment – Maintains >80% locking force after 3-5 reuses.
4. Multiple Material Options
Stainless Steel (304/316) – Corrosion-resistant for harsh environments.
Alloy Steel (Grade 8/10) – High strength for heavy-duty applications.
Copper-Nickel Alloy – Ideal for chemical and marine use.
Technical Specifications
| Parameter | Details |
|---|---|
| Size Range | M2 – M28 (4–28mm inner diameter, 8–50mm outer diameter) |
| Thickness | 1.2–3mm |
| Temperature Range | -60°C to +300°C |
| Surface Treatment | Galvanized, Dacromet, Passivation |
Applications
Automotive Engine Components – Secure critical fasteners under extreme vibration. Wind Turbine Connections – Reliable performance in dynamic loads. High-Speed Rail Track Fasteners – Ensures long-term stability. Heavy Machinery Drive Systems – Prevents loosening under shock loads. Chemical Pipe Flange Connections – Corrosion-resistant solutions.
Quality Certifications
ISO 898-1:2013 – Mechanical properties certified.
DIN 25201-4 – Railway application standard compliance.
RoHS 2.0 Directive – Environmentally safe materials.
SGS Test Reports – Verified material quality.
Buying Guide
Select Size – Match washer to bolt nominal diameter.
Material Choice – Stainless steel for humid/corrosive environments.
High-Temp Use – Special heat-treated models available.
Extreme Vibration? – Pair with nylon-coated washers for extra security.
Why Choose Us?
40+ Years of Fastener Expertise – Trusted by global industries. Free Samples Available – Test before bulk orders. Custom Technical Solutions – OEM support available. Fast Prototyping – Quick turnaround for specialized needs.
Contact us today for a quote!
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