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Help CenterDouble-layer Spring Washer 0.5-3mm Thickness for Anti-loosening in High Vibration Equipment
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Anping County Boli Hardware Wiremesh Products Factory introduces our premium Double-layer spring washer with thickness ranging from 0.5mm to 3mm, specifically engineered for anti-loosening performance in high vibration equipment. As a manufacturer with over two decades of experience since 1998, we combine precision manufacturing with rigorous quality control to deliver washers that maintain clamping force under extreme dynamic loads. Our double-layer design provides superior elasticity and resilience compared to standard single-coil washers, ensuring reliable fastening in applications such as heavy machinery, automotive engines, and industrial pumps. With an annual export value of US$5-10 million, we serve global markets from North America to Southeast Asia, offering customized solutions to meet your specific requirements.
Key Features & Technical Specifications
- Double-layer structure – Two intertwined coils create a spring effect that absorbs vibration and prevents nut or bolt loosening.
- Wide thickness range – Available from 0.5mm to 3mm, suitable for various fastener sizes and load requirements.
- High-grade spring steel – Made from 65Mn or 70# carbon steel, offering excellent hardness and fatigue resistance.
- Customizable dimensions – Inner and outer diameters can be tailored to fit your specific bolt or screw sizes.
- Multiple surface treatments – Options include zinc plating, black oxide, phosphating, or plain finish, depending on corrosion resistance needs.
- Consistent force output – Each washer undergoes hardness and deflection testing to ensure uniform spring characteristics.
- Cost-effective solution – Compared to premium locking mechanisms like nylon inserts or chemical threadlockers, our double-layer spring washers provide a simple yet effective alternative at a lower cost.
Typical Applications
| Industry | Application Examples |
| Automotive | Engine mounts, suspension systems, transmission assemblies |
| Heavy Machinery | Excavators, crushers, vibratory feeders |
| Industrial Equipment | Pumps, compressors, generators |
| Railway & Aerospace | Fasteners in rail joints, aircraft landing gear |
Technical Parameters (Sample)
| Thickness (mm) | Inner Diameter (mm) | Outer Diameter (mm) | Recommended Bolt Size | Max Load (N) |
| 0.5 | 5.0 | 10.0 | M3 | 150 |
| 1.0 | 8.0 | 16.0 | M6 | 500 |
| 2.0 | 12.0 | 24.0 | M10 | 1200 |
| 3.0 | 16.0 | 32.0 | M14 | 2500 |
Why Choose Our Double-Layer Spring Washers?
- Enhanced anti-loosening – The double-layer design provides a spring force that continuously counteracts bolt relaxation, even under continuous vibration.
- Durability – Made from high-quality spring steel with proper heat treatment, ensuring long service life without permanent deformation.
- Easy installation – No special tools required; simply place between nut and workpiece.
- Temperature resistance – Suitable for standard operating temperatures up to 200°C (with optional high-temp surface treatment).
- Economical – Lower cost per unit compared to alternative locking devices, especially in high-volume applications.
Our manufacturing process ensures consistent quality across every batch. Each washer is tested for spring deflection, hardness (typically 40-50 HRC), and dimensional accuracy. We offer packaging in bulk or individual boxes, with custom labeling available upon request.
Trust & Experience
Anping County Boli Hardware Wiremesh Products Factory has been a trusted manufacturer since 1998, exporting to over 20 countries and regions including North America, Europe, and Southeast Asia. Our annual export value of US$5-10 million reflects the confidence our global clients place in our products. We ship from major ports such as Tianjin, Qingdao, Shanghai, and Foshan, ensuring timely delivery worldwide. Whether you need standard sizes or custom dimensions, our team is ready to provide technical support and samples for evaluation. Contact us today to discuss your anti-loosening requirements and experience the reliability of our double-layer spring washers.
Frequently Asked Questions
Q1: What is the difference between a double-layer spring washer and a single-layer one?
A: A double-layer spring washer consists of two interlocking coils, providing greater elasticity and a higher spring force. This makes it more effective in preventing loosening under high vibration compared to a single-layer washer.
Q2: Can these washers be used with stainless steel fasteners?
A: Yes, we offer stainless steel versions (e.g., 304, 316) for corrosion-resistant applications. Please specify your material preference when ordering.
Q3: What is the maximum temperature these washers can withstand?
A: Standard carbon steel washers can operate up to 200°C. For higher temperatures, we recommend special surface treatments or stainless steel options.
Q4: Do you offer custom sizes beyond the 0.5-3mm thickness range?
A: We can produce washers with thicknesses from 0.3mm to 6mm for special orders. Please contact us with your specific requirements.
Q5: How can I ensure the correct size for my bolt?
A: The inner diameter of the washer should match the bolt diameter closely. Our technical team can help you select the appropriate size based on your fastener specifications.
Q6: Are these washers reusable after removal?
A: Double-layer spring washers are designed for single-use applications where maximum locking force is required. However, they may be reused if not deformed. We recommend replacing them after each disassembly for optimal performance.
Q7: What packaging options are available?
A: We offer standard packaging in 500-piece or 1000-piece bags, with custom polybags, boxes, or bulk cartons. Export packaging with pallets is available for large orders.
Q8: How long does delivery take?
A: For standard sizes, delivery is typically 7-15 days after order confirmation. Custom orders may require 15-25 days, depending on quantity and specifications.
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