DIN 6923 / GB6177 Stainless Steel Serrated Hex Flange Nuts – M3 to M16 – 304/316 Grade

When reliability and stability are non-negotiable, our Stainless Steel Serrated Hex Flange Nuts stand as the ultimate fastening solution. Manufactured to meet the rigorous standards of DIN 6923 and GB6177, these hex flange nuts combine robust mechanical performance with exceptional corrosion resistance, making them ideal for demanding industrial and commercial applications.

Available in SS201, SS304 (A2-70), and SS316 (A4-80) grades, these serrated flange nuts are engineered to excel in high-vibration environments, corrosive conditions, and heavy-duty assemblies. The lock nut with flange design integrates multiple functions into a single component, eliminating the need for separate washers and anti-vibration accessories. Whether you’re working on solar panel mounting hardware, automotive fasteners, or marine-grade equipment, these metric stainless steel flange nuts deliver consistent, long-lasting performance.

The defining feature of our serrated flange nuts is the precision-machined serrated base. These sharp, angled teeth bite into the mating surface during installation, creating a powerful friction lock that resists loosening caused by vibration, thermal cycling, and dynamic loads. Unlike standard lock nuts that rely on nylon inserts or split washers, this mechanical locking mechanism remains effective even after repeated temperature fluctuations, making it ideal for automotive and industrial applications. The serrated flange acts as a built-in anti-vibration washer, ensuring your assemblies stay secure in the harshest conditions.

Our corrosion-resistant flange nuts are available in two primary stainless steel grades, each tailored to different environmental challenges:

Both grades are passivated and polished to a bright, reflective finish, further improving corrosion resistance and ensuring long-term performance. For applications requiring budget-friendly corrosion protection, we also offer 201 stainless steel hex nuts, which provide good performance in low-corrosion environments.

The wide flange on our hex flange nuts eliminates the need for separate washers, reducing assembly time and part count. This integrated design offers two critical benefits:

This combination of features makes our heavy-duty serrated flange nuts a cost-effective solution for any project requiring reliable, vibration-resistant fastening.

Every DIN 6923 flange nut we produce adheres to strict manufacturing standards, ensuring dimensional accuracy, mechanical performance, and interchangeability with components from other manufacturers. The GB6177 standard further validates our commitment to quality, making these nuts suitable for use in international engineering projects, OEM assemblies, and custom applications.

Our M3 to M16 flange nuts cover a comprehensive range of metric sizes, ensuring compatibility with most standard bolt sizes. From the compact M3 nut ideal for small electronics to the heavy-duty M16 nut designed for structural applications, we have the right size for your project.

The versatility of our stainless steel flange nuts makes them suitable for a wide range of industries and applications:

In solar panel mounting hardware, our serrated flange nuts play a critical role in securing PV panels, mounting rails, and support structures. The anti-vibration design ensures the nuts remain tight despite constant exposure to wind, thermal expansion, and environmental stress. Both 304 and 316 stainless steel flange nuts are commonly used in solar installations, with 316 grade preferred for coastal or high-moisture environments to prevent corrosion.

The automotive industry relies on hex flange nuts for securing chassis components, engine parts, suspension systems, and exhaust assemblies. The serrated flange’s resistance to vibration is particularly valuable in vehicles, where constant movement and engine vibration can cause standard nuts to loosen over time. Our heavy-duty serrated flange nuts meet the durability requirements of OEM and aftermarket automotive applications.

In construction, stainless steel flange nuts are used in structural steel connections, scaffolding, and facade systems. The integrated washer design simplifies installation on construction sites, while the corrosion-resistant properties ensure long-term performance in outdoor applications. For projects near coastal areas or industrial zones, 316 marine-grade fasteners provide the necessary protection against saltwater and chemical corrosion.

Marine environments present some of the most challenging conditions for fasteners, with saltwater, humidity, and constant vibration leading to rapid corrosion and loosening. Our 316 stainless steel flange nuts (A4-80 / Marine Grade) are specifically engineered to withstand these harsh conditions, offering superior resistance to chloride corrosion and maintaining their locking performance in high-moisture environments. They are commonly used in boat building, offshore platforms, and marine equipment assemblies.

From conveyor systems to manufacturing equipment, industrial machinery requires fasteners that can handle continuous vibration and heavy loads. Our lock nut with flange design provides the reliability needed for these applications, ensuring that critical components remain securely fastened even under extreme operating conditions.

For general engineering projects and DIY applications, our metric stainless steel flange nuts offer a versatile solution for fastening wood, metal, and plastic components. The bright polished finish also makes them suitable for applications where aesthetics are important, such as furniture assembly and decorative metalwork.

Choosing the right material is essential to ensuring the long-term performance of your fasteners. Here’s a detailed comparison of our two primary stainless steel grades:

For applications where cost is a primary concern and corrosion risks are low, our 201 stainless steel hex nuts offer a budget-friendly alternative, providing adequate performance in low-corrosion environments.

As a leading wholesale hex flange nut supplier, we take pride in manufacturing fasteners that meet the highest industry standards. Every nut undergoes rigorous quality control inspections to ensure dimensional accuracy, thread integrity, and mechanical performance.

The integrated washer and serrated locking design eliminates the need for additional components, reducing both material costs and installation time. Our stainless steel flange nuts offer a complete fastening solution in a single, high-quality component.

From automotive fasteners to marine-grade fasteners, our nuts are designed to perform in a wide range of applications. With multiple sizes and materials available, you can find the perfect solution for your specific project requirements.

The serrated flange design provides superior resistance to vibration and loosening, ensuring your assemblies remain secure for years to come. Unlike nylon insert lock nuts, our mechanical locking mechanism remains effective even at high temperatures, making it suitable for use in engine compartments and industrial machinery.

Q: What is the advantage of a serrated flange nut?

A: The serrated flange design provides two key benefits: first, the sharp teeth bite into the mating surface, creating a powerful friction lock that resists loosening caused by vibration and thermal cycling. Second, the wide flange acts as an integrated washer, distributing clamping pressure evenly and eliminating the need for separate washers. This combination results in a more secure, stable, and cost-effective fastening solution.

Q: Can I use 304 stainless steel flange nuts in marine environments?

A: While 304 stainless steel offers good corrosion resistance, it is not recommended for marine or coastal applications where saltwater exposure is frequent. The chloride ions in saltwater can cause pitting corrosion in 304 grade stainless steel over time. For marine environments, we strongly recommend our 316 stainless steel flange nuts (A4-80 / Marine Grade), which contain molybdenum to provide enhanced resistance to chloride corrosion.

Q: Are these nuts compatible with standard metric bolts?

A: Yes, our metric stainless steel flange nuts are manufactured to DIN 6923 standards, ensuring compatibility with standard metric bolts and threaded studs. The thread tolerances are strictly controlled to provide a precise fit with matching bolts.

Q: Do I need to use washers with these flange nuts?

A: No, the integrated flange on our hex flange nuts eliminates the need for separate washers. The flange is designed to distribute load and protect the mating surface, providing the same function as a standard washer while reducing assembly complexity.

Q: What is the minimum order quantity for bulk purchases?

A: As a wholesale supplier, we offer flexible order quantities to meet the needs of both small projects and large-scale industrial applications. Please contact our sales team for detailed pricing and minimum order information based on your specific requirements.

When it comes to reliable, long-lasting fastening solutions, our DIN 6923 / GB6177 Stainless Steel Serrated Hex Flange Nuts are the ideal choice. Whether you’re working on a solar energy project, automotive assembly, marine equipment, or industrial machinery, these nuts deliver the performance, durability, and corrosion resistance you need. As a trusted wholesale hex flange nut supplier, we’re committed to providing high-quality fasteners that meet the demands of your most challenging applications.

Ready to find the perfect stainless steel flange nuts for your project? Contact our sales team today to discuss your requirements, request bulk pricing, or learn more about our full range of fastener solutions.