DIN 6923 Flange Nut | Stainless Steel & Grade 8/10 Serrated Nut

Flange Nut (DIN 6923) | Integrated Washer & Anti-Vibration Design
Our flange nuts feature a wide, integrated circular flange that acts as a built-in, non-spinning washer. Designed to distribute pressure and prevent loosening under vibration, these serrated flange nuts are available in Stainless Steel (A2-70/A4-80) and High-Tensile Carbon Steel (Class 8/10).
  • Standard: DIN 6923, ISO 4161, EN 1661.
  • Size Range: M3 to M20 (Metric) | 1/4″ to 3/4″ (Inch).
  • Types: Serrated or Non-Serrated (Smooth).
  • Finish: Zinc Plated, Black Oxide, Dacromet, Plain.
    Contact us for bulk wholesale pricing and technical drawings today!
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Premium Flange Nut: Enhanced Stability and Locking Performance

A flange nut (also known as a collar nut) is a specialized hexagon nut with a wide flange at one end that serves as an integrated, non-rotating washer. At [Your Brand Name], our DIN 6923 flange nuts are designed to increase the bearing surface of the nut, distributing the clamping pressure over a wider area and protecting the mating part’s surface.

Serrated vs. Smooth Flange Nuts

We provide two primary types of flange nuts to meet different engineering needs:

  • Serrated Flange Nut: Features a notched surface on the flange. These serrations dig into the material surface, providing excellent anti-vibration and locking properties, making them ideal for automotive and industrial machinery.
  • Smooth Flange Nut: A flat, non-serrated surface used when surface marring must be avoided while still benefiting from the load-distribution of the flange.

Materials, Standards, and Grade 8/10 Performance

Our manufacturing process adheres to strict ISO 9001 quality controls. We offer:

  • Stainless Steel Flange Nuts: Utilizing SS304 and SS316 for superior rust resistance in solar racking and marine applications.
  • High-Strength Carbon Steel: Our Class 8 and Class 10 flange nuts are heat-treated to ensure they can withstand high torque requirements in structural assemblies.

Technical Dimensions (Metric DIN 6923)

Size (d)Pitch (P)Flange Dia (dc)Width Across Flats (s)
M61.0014.2mm10.0mm
M81.2517.9mm13.0mm
M101.5021.8mm15.0mm
M121.7526.0mm18.0mm

Why Source Your Flange Nuts From Us?

As a leading flange nut manufacturer, we offer more than just fasteners. We provide full traceability, Material Test Certificates (MTC), and customized packaging solutions. Our Zinc Plated and Dacromet finishes are salt-spray tested to ensure they meet your specific corrosion-resistance requirements.

Looking for a Bulk Flange Nut Quote?

We provide wholesale pricing for M4-M20 sizes in various materials. Contact our technical team for free samples and a fast 24-hour quotation.

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Product Name

Flange Nut / Hexagon Nut with Flange / Collar Nut

Standard

DIN 6923, ISO 4161, ANSI/ASME B18.2.2

Material Grade

Class 8, 10; Stainless Steel 304 (A2-70), 316 (A4-80)

Diameter (d)

M4, M5, M6, M8, M10, M12, M14, M16

Surface Treatment

Cr3+ Zinc (Blue/White/Yellow), HDG, Black Zinc

Feature

Serrated face for locking or Smooth face for surface protection