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Home > Tools & Hardware > Hardware Accessories > Spring > Double-layer Spring Washer 1.5mm Thick 30mm OD Spring Steel Zinc Plated Fastener

Double-layer Spring Washer 1.5mm Thick 30mm OD Spring Steel Zinc Plated Fastener

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Product Spotlights

Double-layer design provides superior locking force and vibration resistance. Made from premium spring steel (65Mn) with precise 1.5mm thickness and 30mm OD. Zinc plated for corrosion protection. Customizable inner diameter. Backed by 25+ years of manufacturing experience and global export reliability.

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

Key Specifications

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Material:

Other, Spring Steel (65Mn or equivalent)

Thickness:

1.5 mm

Outer Diameter:

30 mm

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
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Material Other, Spring Steel (65Mn or equivalent)

Thickness 1.5 mm

Outer Diameter 30 mm

Surface Treatment Zinc Plated

Type Double-layer (Twin)

Inner Diameter Customizable (upon request)

Color Silver (Zinc finish)

Application Industrial fastening, automotive, machinery

Standard Available according to DIN 7980 or similar

Packaging Bulk or custom packaging

Anping County Boli Hardware Wiremesh Products Factory has been a trusted manufacturer of precision fasteners since 1998. With an annual export value exceeding US$5 million and a strong presence in over 15 global markets, we bring decades of expertise to every product we deliver. Our Double-layer spring washer 1.5mm Thick 30mm OD Spring Steel Zinc Plated Fastener is engineered to provide superior locking force and vibration resistance in demanding applications. Made from high-quality spring steel and finished with a durable zinc plating, this washer offers reliable performance for industrial, automotive, and construction assemblies. Whether you need to secure bolted joints under heavy loads or prevent loosening from dynamic forces, our double-layer design delivers consistent clamping force and long service life.

Product Features & Technical Specifications

Double-layer construction – Two spring steel layers work together to create a higher spring rate and greater elastic recovery, ensuring the washer maintains tension even after repeated loading cycles.
Precision thickness of 1.5mm – Provides a balanced combination of flexibility and strength for medium to heavy-duty fastening applications.
30mm outer diameter (OD) – Designed to accommodate standard bolt sizes and distribute load evenly over a larger surface area.
Spring steel material (65Mn or equivalent) – Offers excellent fatigue resistance, hardness, and elasticity to withstand constant stress and vibration.
Zinc plated surface finish – Provides corrosion resistance and a clean, low-maintenance appearance. Suitable for indoor and moderate outdoor environments.
Uniform edge and burr-free design – Ensures easy installation and prevents damage to mating surfaces.
Available in custom sizes – Inner diameter, thickness, and OD can be tailored to meet specific OEM requirements.

Parameter	Specification
Material	Spring Steel (65Mn, 60Si2Mn, or equivalent)
Thickness	1.5 mm (±0.1 mm)
Outer Diameter	30 mm (±0.5 mm)
Inner Diameter	To match customer’s bolt size (e.g., M10, M12, M14) – customizable
Surface Finish	Zinc Plated (blue/white passivation optional)
Hardness	42–48 HRC (typical)
Standard	Meets or exceeds DIN 7980 / comparable standards
Packaging	Bulk in poly bags, carton boxes, or as per customer request

Benefits to the Customer

Enhanced joint security – The double-layer spring action prevents bolts from loosening due to vibration, thermal expansion, or settling of components.
Reduced maintenance – Fewer re-tightening requirements lower downtime and labor costs in machinery and equipment.
Long service life – Spring steel’s high fatigue limit ensures the washer retains its elasticity over thousands of load cycles.
Corrosion protection – Zinc plating provides a barrier against moisture and mild chemicals, extending the life of the washer and the assembly.
Versatile compatibility – Suitable for use with standard bolts, screws, and nuts in automotive chassis, industrial pumps, conveyors, steel structures, and more.
Cost-effective solution – A reliable locking mechanism without the need for additional adhesives or complex locking devices.

Trust & Reliability

Anping County Boli Hardware Wiremesh Products Factory has been a dedicated manufacturer for over 25 years, exporting to North America, South America, Europe, Southeast Asia, Africa, Oceania, and the Middle East. Our annual export value of US$5–10 million reflects the consistent quality and trust we have earned globally. We ship from major ports including Tianjin, Qingdao, Shanghai, and Foshan, ensuring efficient logistics for international orders. Every double-layer spring washer undergoes strict dimensional and hardness checks before packaging. We are committed to delivering fasteners that meet your exact specifications. Contact us today for a quote or to discuss your custom requirements – we are ready to support your next project with reliable products and professional service.

Frequently Asked Questions (FAQ)

What is the difference between a double-layer spring washer and a single-layer spring washer?
The double-layer design provides a higher spring force and better resistance to relaxation under repeated loading. It is ideal for applications where high clamping force and vibration resistance are critical.
Is this washer suitable for outdoor use?
Yes, the zinc plating offers moderate corrosion resistance for outdoor environments. For highly corrosive conditions, we can provide additional surface treatments such as yellow zinc, dacromet, or hot-dip galvanizing upon request.
Can I get a custom inner diameter or thickness?
Absolutely. We can customize the inner diameter, outer diameter, thickness, and material to meet your specific requirements. Minimum order quantities may apply.
What standards does this washer comply with?
Our double-layer spring washers are manufactured to meet or exceed DIN 7980 and comparable international standards. If you require compliance with a specific standard (e.g., ASME, ISO), please let us know.
How do I select the correct size for my bolt?
The inner diameter should be slightly larger than the bolt diameter to allow easy installation. For example, an M10 bolt typically uses a washer with an inner diameter of 10.5–11 mm. We recommend providing your bolt size or reference standard when ordering.
What is the typical lead time for bulk orders?
For standard sizes, lead time is usually 10–15 days after order confirmation. Custom orders may require 20–30 days, depending on complexity and quantity.
Do you provide samples for testing?
Yes, we offer free samples for evaluation. The customer pays for shipping costs. Sample requests are processed within 3–5 working days.
What payment terms do you accept?
We accept T/T, L/C, and other common trade terms. Payment terms are negotiable for long-term partners.