Zinc Nickel Flange Bolts for Automotive and Corrosion-Critical Applications
Zinc-nickel flange bolts are widely used in automotive applications where stable torque performance and high corrosion resistance are required.
Due to the flange design, these fasteners are more exposed to moisture and salt, making surface coating selection critical for long-term reliability.
Compared with conventional zinc plating, zinc-nickel coating significantly improves corrosion resistance and reduces the risk of white rust and red rust formation on flange surfaces.
Product Range
Our zinc-nickel flange bolt range includes:
- •Hex flange bolts (metric)
- •Sizes: M6 – M16
- •Strength grades: 8.8 / 10.9 / 12.9
- •Materials: Carbon steel, alloy steel
Why Zinc-Nickel for Flange Bolts?
Flange bolts are commonly used in areas exposed to water, road salt, and vibration.
Zinc-nickel coating provides:
- •Salt spray resistance: 720–1000 hours
- •Improved corrosion protection on flange contact surfaces
- •Better torque consistency during installation
- •Reduced risk of coating damage during tightening
Zinc-Nickel vs Conventional Zinc Plating
| Item | Zinc Plating | Zinc-Nickel Plating |
|---|---|---|
| Corrosion Resistance | Medium | High |
| Flange Area Protection | Limited | Excellent |
| Torque Stability | Average | Stable |
| Automotive Suitability | Limited | Highly suitable |
In-House Zinc-Nickel Plating Advantage
With in-house zinc-nickel plating capability, we can:
- •Control coating thickness and uniformity
- •Ensure stable torque performance
- •Shorten lead time
- •Support consistent quality for repeat orders
This makes our zinc-nickel flange bolts ideal for automotive aftermarket and OEM replacement applications.
Applications
- •Automotive underbody and chassis
- •Suspension systems
- •Engine and transmission assemblies
- •Corrosion-critical fastening points
Frequently Asked Questions
What are zinc-nickel flange bolts?
Zinc-nickel flange bolts are fasteners with an integrated flange design, electroplated with a zinc-nickel alloy coating containing 12–15% nickel. The flange design provides a larger contact surface area, and the zinc-nickel coating offers superior corrosion resistance compared to conventional zinc plating, making them ideal for automotive and corrosion-critical applications.
Why are zinc-nickel coatings important for flange bolts?
Flange bolts are commonly used in areas exposed to water, road salt, and vibration. The flange area is more exposed to moisture and salt, making surface coating selection critical. Zinc-nickel coating provides 720–1000 hours salt spray resistance, improved corrosion protection on flange contact surfaces, better torque consistency during installation, and reduced risk of coating damage during tightening.
What sizes and strength grades are available?
Our zinc-nickel flange bolt range includes hex flange bolts (metric) in sizes M6–M16, with strength grades 8.8, 10.9, and 12.9. Materials include carbon steel and alloy steel.
Are zinc-nickel flange bolts suitable for automotive applications?
Yes, zinc-nickel flange bolts are highly suitable for automotive applications, especially automotive underbody and chassis, suspension systems, engine and transmission assemblies, and corrosion-critical fastening points. They provide stable torque performance and long-term corrosion resistance.
What is the advantage of in-house zinc-nickel plating?
With in-house zinc-nickel plating capability, we can control coating thickness and uniformity, ensure stable torque performance, shorten lead time, and support consistent quality for repeat orders. This makes our zinc-nickel flange bolts ideal for automotive aftermarket and OEM replacement applications.
Contact Us
If you are sourcing zinc-nickel coated flange bolts for automotive or industrial use, please share your required size, strength grade, and quantity.
We will recommend suitable specifications and provide a competitive quotation.
Please contact us with your requirements.
Related Pages
- Zinc-Nickel Fasteners— Zinc-nickel coating is also available for other fastener types. See our zinc-nickel fasteners page for details.
- Zinc-Nickel Plating Technical Guide— Learn more about the coating technology and performance data.
- Zinc-Nickel Fasteners Solutions
Engineering & Specification Support
Fastener selection depends on application environment, load requirements, and installation constraints.
For technical drawings, detailed specifications, or application-specific engineering guidance, contact our engineering team.
Für technische Zeichnungen, Spezifikationen oder anwendungsspezifische Anforderungen kontaktieren Sie uns bitte zur Abstimmung.
Technical inquiries are welcome at any time. We typically respond within one business day.