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Help CenterDouble-layer Spring Washer Factory Direct With Technical Support and Custom Size Available
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Anping County Boli Hardware Wiremesh Products Factory, established in 1998, is a professional manufacturer with over 20 years of experience in producing high-quality fasteners and hardware components. Our Double-layer Spring Washer is designed to provide superior anti-loosening performance in demanding applications. By offering factory direct pricing, dedicated technical support, and full custom size availability, we ensure that every client receives a product tailored to their exact specifications. Whether you need standard sizes or unique dimensions, our engineering team is ready to assist you from design to delivery.
Product Features & Technical Specifications
- Double-layer Design: Two coils working together to provide a stronger spring force, effectively preventing loosening caused by vibration or dynamic loads.
- High-Quality Materials: Manufactured from premium spring steel (e.g., 65Mn, 60Si2Mn) or stainless steel, offering excellent elasticity and durability.
- Customizable Dimensions: Available in metric and imperial sizes, with inner diameter, outer diameter, and thickness adjustable per your requirements — no minimum order quantity for custom sizes.
- Surface Treatment Options: Choose from plain, black oxide, zinc plated, Dacromet, or hot dip galvanized finishes to meet corrosion resistance and environmental standards.
- Consistent Performance: Each washer undergoes strict quality control checks (hardness, elasticity, dimensional accuracy) to ensure reliable performance in the field.
- Application Versatility: Suitable for automotive assembly, heavy machinery, construction equipment, railways, aerospace, and general industrial fastening.
| Parameter | Available Range |
|---|---|
| Inner Diameter (d) | M3 – M30 (custom sizes beyond M30 available upon request) |
| Outer Diameter (D) | Typically 2.2× d to 2.5× d (customizable) |
| Thickness (t) | 0.5 mm – 6 mm (custom) |
| Material | 65Mn, 60Si2Mn, SUS304, SUS316, Carbon Steel (C45, C67) |
| Surface Finish | Plain, Zinc Plated, Black Oxide, Dacromet, Hot Dip Galvanized |
| Hardness (HRC) | 38 – 50 (depending on material and thickness) |
Why Choose Our Double-layer Spring Washer?
- Factory Direct Advantage: Eliminate middlemen costs — get competitive pricing directly from the manufacturer.
- Custom Size Available: No need to compromise on dimensions. Our tooling can produce non-standard sizes quickly and cost-effectively.
- Technical Support: Our experienced engineers can help you choose the right material, surface treatment, and design for your specific application.
- Global Shipping: We ship from major Chinese ports (Tianjin, Qingdao, Shanghai, Foshan) to markets worldwide including North America, Europe, Southeast Asia, Africa, and Oceania.
- Quality Assurance: Each batch is tested for spring force, dimensional accuracy, and surface adhesion to ensure consistent quality.
Frequently Asked Questions (FAQ)
Q1: What is the difference between a double-layer spring washer and a standard single-layer washer?
A: Double-layer spring washers provide two independent coils that exert a stronger spring force, offering better resistance to loosening under vibration compared to single-layer versions. They are ideal for applications where safety is critical.
Q2: Can you produce custom sizes that are not listed in the standard range?
A: Yes, we offer custom sizes for inner diameter, outer diameter, and thickness. Simply provide your drawing or dimensions, and we will produce the washers to your exact specifications.
Q3: What materials are available for these washers?
A: We commonly use 65Mn, 60Si2Mn (spring steel), carbon steel, and stainless steel (SUS304, SUS316). Other materials such as phosphor bronze or beryllium copper are available upon request.
Q4: What surface treatments do you offer for corrosion protection?
A: We offer plain, zinc plated, black oxide, Dacromet, and hot dip galvanized. For harsh environments, Dacromet or hot dip galvanized are recommended.
Q5: Do you provide technical support for selecting the correct washer?
A: Absolutely. Our team can advise on material selection, hardness, surface finish, and dimensional tolerances based on your application load and environment.
Q6: What is the typical lead time for custom orders?
A: For standard sizes, lead time is 7–15 days. Custom sizes typically require 15–25 days, depending on complexity and quantity. Rush orders are possible if arranged with our sales team.
Q7: Can you provide samples for testing before bulk purchase?
A: Yes, we can provide samples (standard or custom) at a nominal cost, fully refundable once a bulk order is placed. Samples are shipped within 3–5 days.
Q8: Which ports do you ship from, and how do you ensure safe delivery?
A: We ship from Tianjin, Qingdao, Shanghai, or Foshan. All products are packed in sturdy cartons or pallets to prevent damage during transit. We can also arrange air freight for urgent orders.
Trust Our Proven Track Record
As a factory established in 1998, Anping County Boli Hardware Wiremesh Products Factory has served clients across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and many other regions. With an annual export value of US$5 million to US$10 million, we have consistently delivered high-quality fasteners and hardware solutions. Our commitment to factory direct prices, custom size flexibility, and responsive technical support makes us a reliable partner for your business. Contact us today for a quote or to discuss your specific requirements — we are ready to help you secure your assemblies with the best double-layer spring washers on the market.
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