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Home > Tools & Hardware > Hardware Accessories > Spring > Double-layer Spring Washer, 1 Year Warranty, Free Replacement for Defects, M3-M36, Reliable Fastening

Double-layer Spring Washer, 1 Year Warranty, Free Replacement for Defects, M3-M36, Reliable Fastening

Double-layer Spring Washer, 1 Year Warranty, Free Replacement for Defects, M3-M36, Reliable Fastening thumbnail-3

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Double-layer Spring Washer, 1 Year Warranty, Free Replacement for Defects, M3-M36, Reliable Fastening photo-5

Product Spotlights

Double-layer spring washer with M3-M36 range, offering superior anti-loosening performance. 1-year warranty with free defect replacement. Made from premium spring steel with precise heat treatment. Customizable surface treatment. Trusted by global markets for over 25 years. Reliable fastening solution for automotive, machinery, and construction.

Negotiable MOQ: 1 Piece (Price negotiable depending on order volume and customization)

Key Specifications

Get Latest Price

Material:

Other, Spring steel (65Mn) / Stainless steel

Size Range:

M3 - M36

Surface Treatment:

Black oxide / Zinc plated / Plain

Contact Supplier Request Quote Chat Now

Anping County Boli Hardware Wiremesh Products Factory

2Yrs

Payment & Shipping

Payment Methods:

Port of Shipment:

tianjin shanghai qingdao

Delivery Detail:

Delivery time depends on order quantity.

Product Details
Company Profile
Contact Us

Material Other, Spring steel (65Mn) / Stainless steel

Size Range M3 - M36

Surface Treatment Black oxide / Zinc plated / Plain

Type Double-layer spring washer

Standard DIN127B / GB93 / ASME B18.21.1

Color Metallic / Black / Silver

Application Automotive, machinery, construction, electronics

Warranty 1 year, free replacement for defects

Packaging Bulk / Box / Custom

Tolerance Class A precision

Welcome to Anping County Boli Hardware Wiremesh Products Factory – a trusted manufacturer with over 25 years of experience (since 1998) in producing high-quality fastening components. Our Double-layer Spring Washer is engineered to deliver superior locking performance and long-term reliability. With an annual export value of US$5-10 million and shipments to major ports worldwide (Tianjin, Qingdao, Shanghai, etc.), we serve customers across North America, Europe, Asia, and beyond. This product provides a robust anti-loosening solution for critical bolted joints, backed by a 1-year warranty and free replacement for any defects.

The double-layer design offers increased elastic deformation and higher clamping force compared to standard single spring washers. Available in a wide range of sizes from M3 to M36, it ensures reliable fastening even under vibration, thermal expansion, or dynamic loads. Whether you need it for automotive assembly, heavy machinery, or structural applications, our spring washer is a cost-effective choice that minimizes maintenance and downtime.

Product Features & Technical Specifications

Dual-Layer Construction: Two interlocking coils provide twice the spring force of standard washers, preventing bolt loosening.
Material Options: Available in 65Mn spring steel (high hardness) or stainless steel (corrosion resistance).
Surface Treatment: Choose from black oxide, zinc plating, or plain finish for different environmental requirements.
Precision Tolerance: Manufactured to Class A precision, ensuring consistent dimensions and fit.
Wide Size Range: Covers M3 to M36, with both metric and inch equivalents available upon request.
Easy Installation: No special tools required – fits standard bolt and nut assemblies.
Reliable Performance: Tested for over 100,000 cycles without loss of preload under vibration.

Product Parameters (Partial)

Size	Inner Diameter (mm)	Outer Diameter (mm)	Thickness (mm)	Material Hardness (HRC)
M3	3.2	6.0	0.8	40-48
M6	6.4	12.0	1.6	40-48
M12	13.0	24.0	3.0	40-48
M24	25.0	44.0	5.0	40-48
M36	37.0	66.0	8.0	40-48

Note: Custom sizes and specifications are available on request. Contact us for non-standard requirements.

Why Choose Our Double-layer Spring Washer?

Enhanced Locking Force: The double-layer design generates up to 30% more elastic force than single-layer washers, significantly reducing the risk of loosening.
Long Service Life: Made from high-quality spring steel with precise heat treatment, ensuring excellent fatigue resistance.
Versatile Compatibility: Fits standard metric bolts and nuts, widely used in automotive, agricultural machinery, and industrial equipment.
Cost-Effective Solution: Eliminates the need for chemical threadlockers or additional locking devices in many applications.
Warranty & Support: 1-year warranty against defects, with free replacement for any manufacturing issues. Our dedicated after-sales team is ready to assist.

Trust & Reliability

As a manufacturer with over two decades of experience, Anping County Boli Hardware Wiremesh Products Factory has exported to more than 20 countries and regions, including North America, Europe, and Southeast Asia. Our annual export value of US$5-10 million reflects the trust global customers place in our products. We ship from major Chinese ports (Tianjin, Qingdao, Shanghai, Foshan) with efficient logistics. Every spring washer undergoes strict quality control to ensure compliance with international standards. Your satisfaction is our priority – we are committed to providing reliable fastening solutions that keep your projects secure.

Contact us today to request a quote or sample. Whether you need a small batch for prototyping or large-volume orders, we offer competitive pricing and flexible customization options. Experience the difference of a professional manufacturer dedicated to your success.

Frequently Asked Questions (FAQ)

Q: What materials are available for the double-layer spring washer?
A: We offer 65Mn spring steel (standard) and stainless steel (304 or 316) for corrosion resistance. Other materials are available upon request.
Q: What surface treatments do you provide?
A: Common options include black oxide, zinc plating (yellow or blue passivation), and plain finish. Custom treatments like Dacromet or hot-dip galvanizing can be arranged.
Q: Can I order a size not listed in the table?
A: Yes, we can produce custom sizes from M2 to M48 or inch equivalents. Please provide your specific dimensions.
Q: How does the double-layer washer compare to a standard spring washer?
A: The double-layer design provides higher elasticity and clamping force, making it more effective against vibration and loosening, especially in heavy-duty applications.
Q: What is the warranty policy?
A: We offer a 1-year warranty covering manufacturing defects. If any washer fails due to material or workmanship issues, we will replace it free of charge.
Q: Do you provide samples before bulk order?
A: Yes, samples are available. Please contact us with your requirements, and we will arrange shipping (sample cost may apply, refundable with bulk order).
Q: What is the minimum order quantity (MOQ)?
A: For standard sizes, MOQ is typically 1000 pieces. For custom sizes, MOQ may be higher. We can discuss based on your project.
Q: How long does shipping take?
A: For standard orders, production takes 10-15 days, plus shipping time (7-30 days depending on destination). Express shipping is available for urgent orders.