What Makes DIN6923 Flange Nuts Different
DIN6923 flange nuts combine a standard hex nut with an integrated washer base. The flange distributes load over a larger area, while the serrated surface helps prevent loosening under vibration.
This design eliminates the need for a separate washer and improves installation efficiency in assembly operations.
Flange nuts are known by different names depending on application and regional usage. They are often referred to as serrated flange nuts or hex flange nuts, especially when the locking feature is emphasized. In standard specifications, they are commonly identified as DIN6923 flange nuts.
Features of Flange Nuts
Integrated Flange Base
Eliminates the need for a separate washer.
01
Serrated Design (optional)
Provides self-locking function by biting into the mating surface.
02
Even Load Distribution
Reduces the risk of surface damage and improves fastening stability.
03
High Strength
Available in various grades suitable for heavy-duty applications.
04
Corrosion Resistance
Different surface coatings available (zinc-plated, hot-dip galvanized, black oxide).
05
Grades & Materials
Flange nuts are manufactured in multiple grades and materials depending on strength requirements:
Carbon Steel: Grades 8, 10, 12
Stainless Steel: A2-70, A4-80
Alloy Steel: For high-strength industrial use
Common Standards
DIN 6923
ISO 4161
JIS B 1190
Surface Treatment Options
Zinc Plated (Blue/Yellow/Black) – rust resistance
Hot-Dip Galvanized – heavy corrosion protection
Black Oxide – anti-glare, mild protection
Plain / Oiled – for applications requiring direct welding or coating
Functions of Flange Nuts
Provides secure fastening without the need for a washer.
Prevents loosening under vibration (serrated type).
Distributes load evenly, minimizing surface wear.
Speeds up assembly since one piece replaces nut + washer.
Applications
Flange nuts are widely used in:
Automotive Industry
Engines, chassis, suspension, exhaust systems.
Machinery & Equipment
Heavy machinery, industrial machines.
Construction
Fastening steel structures and frames.
Electrical & Plumbing
Securing brackets and supports.
Where Flange Nuts Perform Better Than Standard Nuts
Compared with standard hex nuts, flange nuts are preferred in applications where:
Surface protection is required
Vibration resistance is important
Faster installation is needed without extra washers
Typical examples include automotive assemblies, steel structures, and equipment mounting.
Key Structural Features
Integrated Flange Base
Provides wider contact area, reducing pressure on the material surface.
Serrated Locking Surface
Creates friction between the nut and the connected surface, improving resistance to loosening.
Standard Hex Drive
Allows easy installation using common tools without special equipment.
DIN6923 Flange Nut Specifications
Standard: DIN6923
Type: Hex flange nut with serration
Size Range: M5 – M20
Material:
Carbon Steel
Stainless Steel (SS304 / SS316)
Surface Finish:
Zinc plated
Hot dip galvanized
Black oxide
Flange Nut vs Standard Hex Nut
| Feature | Flange Nut (DIN6923) | Standard Hex Nut |
|---|---|---|
| Washer Needed | No | Yes |
| Load Distribution | Wider | Limited |
| Anti-loosening | Better (serrated) | Lower |
| Installation Speed | Faster | Slower |
How To Select The Right Flange Nut
For vibration environments → choose serrated flange nut
For corrosion resistance → use stainless steel
For outdoor structures → select HDG coating
For general fastening → zinc plated is sufficient
Why Choose Our DIN6923 Flange Nuts
Consistent thread accuracy for smooth assembly
Reliable serration quality for anti-loosening performance
Full size availability for different applications
Stable supply for distributors and project orders
OEM packaging and private labeling support
Fast response for international inquiries
FAQ
Q1: What Is A Serrated Flange Nut?
A flange nut with a serrated base that increases friction to prevent loosening.
Q2: Do Flange Nuts Need Washers?
No, the integrated flange replaces the washer.
Q3: Are Flange Nuts Reusable?
They can be reused, but repeated use may reduce the locking effect.
Q4: Can Flange Nuts Be Used On Painted Surfaces?
Not recommended, as serrations may damage the coating.
Get A Quote
Send your required size, grade,surfacetreatment,material, and quantity.
We will provide quotation and technical support within 12 hours.
Free samples can be arranged if you like.
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