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Help Center304 Stainless Steel M8 Double Coil Spring Washer DIN 127B Anti-Loosening Fastener
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As a trusted manufacturer since 1998, Anping County Boli Hardware Wiremesh Products Factory is proud to offer our 304 Stainless Steel M8 Double Coil Spring Washer DIN 127B Anti-Loosening Fastener. This product is engineered to provide reliable locking performance in demanding environments, combining the corrosion resistance of 304 stainless steel with the proven double coil design. With an annual export value of US$5–10 million and shipments from major ports like Tianjin, Qingdao, Shanghai, and Foshan, we serve global markets including North America, Europe, and Asia. Our M8 double coil spring washer is a cost-effective solution for preventing loosening under vibration and dynamic loads.
The double coil construction offers superior elastic recovery compared to single coil washers, ensuring consistent clamping force over time. Each washer conforms to DIN 127B specifications, guaranteeing dimensional accuracy and interchangeability. The 304 stainless steel material provides excellent resistance to rust, oxidation, and chemicals, making it suitable for outdoor, marine, and food processing applications. Below are detailed technical specifications and advantages.
Key Features & Technical Specifications
- Material: 304 Stainless Steel (AISI 304) – offers high corrosion resistance and durability.
- Size: M8 (suitable for M8 bolts and nuts).
- Standard: DIN 127B – ensures precise dimensions and reliable performance.
- Design: Double coil spring washer – provides enhanced spring action and anti-loosening effect.
- Surface Finish: Plain (passivated) – natural protective oxide layer; optional coatings available upon request.
- Hardness: Approximately 400 HV (typical) – balances strength and flexibility.
- Operating Temperature: Suitable for temperatures from -200°C to +800°C (typical 304 range).
- Packaging: Available in bulk bags, small boxes, or custom packaging to meet your needs.
| Parameter | Value (Typical) |
|---|---|
| Outer Diameter (OD) | 16 mm |
| Inner Diameter (ID) | 8.4 mm |
| Thickness (t) | 1.6 mm |
| Coil Height (h) | 3.2 mm (approx.) |
| Weight per 1000 pcs | ~2.5 kg |
Advantages over single coil washers: The double coil design provides approximately 50% more spring force, compensating for thermal expansion, settling, and vibration. It reduces the risk of fastener loosening, which is critical in automotive, machinery, and structural applications. Additionally, the 304 stainless steel eliminates the need for additional plating or coating in most environments, saving cost and time.
Customer benefits: By choosing our DIN 127B double coil spring washers, you gain a reliable anti-loosening solution that extends maintenance intervals, improves safety, and reduces downtime. The washers are fully compatible with standard M8 fasteners and can be used in conjunction with lock nuts or thread-locking compounds for enhanced security. Our factory can provide custom sizes, finishes, and packaging to meet OEM or project requirements.
Trusted by global industries since 1998
Anping County Boli Hardware Wiremesh Products Factory has been a reliable manufacturer for over 25 years. With an annual export value of US$5–10 million, we supply to markets across North America, South America, Europe, Asia, Africa, and Oceania. Our products are shipped from major Chinese ports (Tianjin, Qingdao, Shanghai, Foshan) with efficient logistics. We have a dedicated quality control team to ensure each batch meets DIN 127B standards. Our experience and scale allow us to offer competitive pricing without compromising on quality.
We understand that fasteners are a small but critical component in any assembly. That's why we focus on consistent performance, precise dimensions, and reliable delivery. Whether you are a distributor, OEM, or contractor, we invite you to contact us for samples, quotations, or technical support. Let our double coil spring washers provide the security your applications deserve.
Frequently Asked Questions (FAQ)
-
What is the difference between a single coil and double coil spring washer?
The double coil design provides greater spring force and better load distribution, making it more effective in preventing loosening under high vibration or dynamic loads. -
Is this washer suitable for outdoor or marine use?
Yes, 304 stainless steel offers excellent corrosion resistance, making it ideal for outdoor, marine, and chemical environments. However, for highly corrosive conditions (e.g., saltwater spray), we recommend 316 stainless steel (available upon request). -
What is the temperature range of this washer?
304 stainless steel typically performs well from -200°C to +800°C. For extreme temperatures, please consult our technical team. -
Can I get washers in other sizes or materials?
Yes, we offer a wide range of sizes (M3 to M30) and materials (carbon steel, 316 stainless steel, brass, etc.) with custom orders. Please contact us with your requirements. -
What is the minimum order quantity (MOQ)?
Our standard MOQ is 1000 pieces per size, but we can accommodate smaller orders for samples or special projects. Contact us for details. -
What packaging options are available?
We offer bulk packaging (poly bags, cartons), small retail boxes, or custom labeling. Please specify your preference. -
How long is the delivery time?
For standard stock sizes, delivery is usually 7–15 days after order confirmation. For custom orders, lead time may be 20–30 days depending on quantity. -
Do you provide certificates of conformity or test reports?
Yes, we can provide material certificates and dimensional inspection reports upon request. Our products are manufactured according to DIN 127B standards.
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