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Home > Tools & Hardware > Hardware Accessories > Spring > Double Coil Spring Washer DIN127 A2 70mm Outer Diameter 3mm Thickness

Double Coil Spring Washer DIN127 A2 70mm Outer Diameter 3mm Thickness

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Product Spotlights

Double coil design provides superior anti-loosening force; DIN127 compliant A2 stainless steel (304) ensures excellent corrosion resistance; 70mm OD & 3mm thickness for heavy-duty fastening; manufactured by experienced factory with 25+ years, supported by global export expertise.

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

Key Specifications

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Material:

Other, A2 Stainless Steel (304)

standard:

DIN127

outer_diameter:

70mm

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, A2 Stainless Steel (304)

standard DIN127

outer_diameter 70mm

thickness 3mm

type Double Coil

surface_finish Plain / Passivated

application Anti-loosening fastening

packaging Customizable (bulk bag, box, etc.)

color Silver metallic

As a leading manufacturer Anping County Boli Hardware Wiremesh Products Factory (established in 1998, with annual export value of US$5-10 million), we proudly present our Double Coil Spring Washer DIN127 A2 70mm Outer Diameter 3mm Thickness. This precision-engineered washer is designed to provide superior anti-loosening performance in demanding applications, combining the reliability of the DIN127 standard with the corrosion resistance of A2 stainless steel. Our decades of experience ensure that every washer meets strict quality control, making it a trusted choice for global customers across North America, Europe, and Asia.

The double coil spring washer features a unique two-coil design that delivers enhanced spring tension compared to standard single-coil washers. This creates a stronger locking force, effectively preventing nut and bolt loosening under vibration, thermal expansion, and dynamic loads. The 70mm outer diameter and 3mm thickness are specifically engineered for heavy-duty applications where secure fastening is critical.

Below are the key technical specifications and performance attributes of this product:

Parameter	Value
Standard	DIN127
Material	A2 Stainless Steel (304)
Outer Diameter	70 mm
Thickness	3 mm
Coil Type	Double Coil
Surface Finish	Plain / Passivated (optional)
Hardness	Approx. 380-450 HV
Temperature Range	-200°C to +800°C (depending on application)

Key Features & Benefits:

Enhanced Locking Force: The double coil design provides up to 50% more spring tension than single-coil washers, ensuring bolts stay tight under extreme vibration.
Corrosion Resistance: Made from premium A2 stainless steel (304 grade), ideal for outdoor, marine, and chemical environments where rust is a concern.
DIN127 Compliance: Fully conforms to the German standard for spring washers, guaranteeing dimensional accuracy and performance.
Fatigue Resistance: The material and heat treatment process optimize elasticity, preventing permanent deformation over repeated loading cycles.
Easy Installation: Standard dimensions allow direct replacement of ordinary washers; no special tooling required.
Versatile Applications: Suitable for automotive, machinery, construction, railway, and heavy equipment assembly.

Why Choose Our Double Coil Spring Washer?

Compared to ordinary flat washers or single-coil spring washers, the double coil design distributes load more evenly and maintains consistent clamping force. This is critical in applications where loosening could lead to equipment failure or safety hazards. The 70mm outer diameter and 3mm thickness are specifically chosen for larger fasteners (e.g., M30-M36 bolts), providing a robust anti-rotation barrier.

We also offer customization options: surface passivation, special packaging, or even non-standard dimensions (available upon request). Our factory has been producing hardware fasteners for over 25 years, and we have shipped millions of washers to clients worldwide.

Trust & Reliability: Anping County Boli Hardware Wiremesh Products Factory has been a trusted manufacturer since 1998, with annual export value exceeding US$5 million. Our products are exported to major markets including North America, South America, Europe, Asia, Africa, and Oceania. We ship via Tianjin, Qingdao, Shanghai, and Foshan ports, ensuring fast and cost-effective logistics. With a strong domestic and international customer base, we are committed to providing consistent quality, competitive pricing, and responsive customer service. Contact us today to place your order or request a sample!

FAQ – Frequently Asked Questions

Q: What is the difference between a double coil spring washer and a single coil?
A: The double coil washer has two overlapping coils that generate higher spring force and provide better resistance to loosening under vibration compared to single coil designs.
Q: Is this washer suitable for high-temperature applications?
A: A2 stainless steel can withstand temperatures up to 800°C in oxidizing environments, but for sustained high-temperature use, we recommend consulting our technical team for specific conditions.
Q: Can I get a custom size or material?
A: Yes, we offer customization for outer diameter, thickness, material (e.g., A4 stainless steel, carbon steel), and surface finish. Please contact us with your requirements.
Q: What is the typical packaging for this product?
A: Standard packaging includes bulk poly bags, small boxes, or palletized cartons. Custom labeling and packaging are available upon request.
Q: Do you provide samples before mass production?
A: Yes, we offer samples for quality evaluation. Sample cost and shipping are negotiable; it may be waived for bulk orders.
Q: What is the minimum order quantity (MOQ)?
A: For standard sizes, MOQ is typically 1000 pieces. For custom sizes, MOQ may vary depending on complexity.
Q: How do you ensure the quality of the washers?
A: We conduct dimensional inspection, hardness testing, and visual inspection on each batch. Our quality control system follows DIN127 standards and internal procedures.
Q: Which ports do you ship from?
A: We can ship from Tianjin, Qingdao, Shanghai, and Foshan ports, giving you flexible logistics options.