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Help CenterDouble Coil Spring Washer M14 M16 Carbon Steel Black Oxide Finish Metric
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Anping County Boli Hardware Wiremesh Products Factory, established in 1998, is a professional manufacturer dedicated to producing high-quality fasteners. Our Double Coil Spring Washer M14 M16 Carbon Steel Black Oxide Finish Metric represents a reliable solution for demanding fastening applications. With over two decades of experience and an annual export value of US$5 million to US$10 million, we supply to markets across North America, South America, Europe, Asia, Africa, and Oceania. This product is designed to provide superior vibration resistance and load distribution, making it an essential component in heavy machinery, automotive assemblies, and industrial equipment.
The double coil design offers enhanced locking capability compared to standard single-coil spring washers. Each washer is manufactured from high-quality carbon steel, then treated with a black oxide finish for improved corrosion resistance and a sleek appearance. Available in the metric sizes M14 and M16, these washers meet the dimensional requirements of standard metric fasteners. They are ideal for applications where secure fastening under dynamic loads is critical.
Key Features & Technical Specifications
- Material: Premium carbon steel, ensuring high tensile strength and durability.
- Finish: Black oxide coating provides moderate corrosion protection and reduces reflectivity.
- Double Coil Design: Two coils distribute load evenly and create a strong spring action to prevent loosening.
- Metric Sizes: M14 and M16 conform to standard metric thread dimensions.
- Application Versatility: Suitable for use with bolts, nuts, and screws in mechanical assemblies.
- Consistent Quality: Each batch undergoes dimensional inspection to ensure uniformity.
| Parameter | M14 | M16 |
|---|---|---|
| Inner Diameter (mm) | 14.2 - 14.7 | 16.2 - 16.8 |
| Outer Diameter (mm) | 28 - 30 | 32 - 34 |
| Thickness (mm) | 3.5 - 4.0 | 4.0 - 4.5 |
| Hardness (HRC) | 40-50 (customizable) | 40-50 (customizable) |
| Surface Treatment | Black Oxide | Black Oxide |
The double coil design provides a significant advantage over plain washers or single-coil spring washers. When compressed, the two coils store more energy, maintaining a constant clamping force even under vibration or thermal expansion. This reduces the risk of fastener loosening, extending the maintenance interval of your equipment. The black oxide finish also offers a mild lubricity, which can simplify assembly and reduce galling on the mating surfaces.
For customers requiring specific tolerances or surface treatments, we offer customization options. Our engineering team can adjust hardness, coil dimensions, or apply alternative finishes (such as zinc plating or phosphate coating) upon request. This flexibility makes our Double Coil Spring Washers suitable for a wide range of industries, including automotive, construction, mining, and agricultural machinery.
Frequently Asked Questions (FAQ)
-
What is the advantage of a double coil spring washer over a single coil?
The double coil provides higher spring force and better load distribution, resulting in superior locking performance under dynamic conditions. It is ideal for applications where vibration or shock loads are present. -
Can these washers be used with stainless steel bolts?
Yes, but due to potential galvanic corrosion, we recommend considering a zinc or nickel-plated version if the environment is corrosive. Black oxide offers moderate protection; for severe environments, consult our technical team for alternative coatings. -
Are M14 and M16 the only sizes available?
Currently we offer M14 and M16 as standard sizes. Other metric sizes (e.g., M12, M18, M20) can be produced on a custom order basis with minimum quantities. -
What is the typical hardness of these washers?
Standard hardness is 40-50 HRC. Hardness can be adjusted to meet specific customer requirements, such as higher hardness for extreme loads or lower hardness for applications requiring more flexibility. -
How should I store these washers to maintain the black oxide finish?
Store in a dry, cool environment away from moisture and chemicals. The black oxide coating is relatively stable but may corrode if exposed to prolonged humidity. Using anti-rust paper or oiled packaging can extend shelf life. -
Do you provide samples before bulk order?
Yes, sample orders are welcome. Please contact our sales team with your requirements. Samples are available at cost plus shipping, and we can customize dimensions for evaluation. -
What is the lead time for custom orders?
For standard M14/M16 sizes, lead time is typically 15-20 days after order confirmation. Custom sizes or finishes may require 25-35 days, depending on complexity and quantity. -
How do you ensure quality consistency?
We conduct dimensional inspections using calibrated gauges, hardness testing, and visual checks on each batch. Our factory has been producing hardware since 1998, and we follow internal quality control procedures to maintain high standards.
With an annual export value of US$5 million to US$10 million and a global distribution network, Anping County Boli Hardware Wiremesh Products Factory has earned the trust of clients in North America, South America, Europe, Asia, Africa, and Oceania. Our products are shipped from major ports including Tianjin, Qingdao, Shanghai, and Foshan, ensuring efficient logistics. We are committed to providing cost-effective, reliable fastening solutions. Contact us today to discuss your requirements or request a quote for Double Coil Spring Washers in M14 and M16 sizes with black oxide finish.
Choose Anping County Boli Hardware – your partner in precision fasteners since 1998.
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