Basic Specifications
- Standards: DIN 6923 (equivalent to GB/T 6177.1)
- Thread sizes: M3–M20 (metric coarse thread)
- Thread tolerance: 6H/6G
- Strength grades: Carbon steel Grade 8 / Grade 10; Stainless steel A2-70
- Surface Treatment: Zinc-plated (blue-white), color-coated zinc, blackened, natural finish, passivated
- Flange Type: With anti-slip teeth (standard), smooth (optional)
Key Product Features
DIN 6923 flange nuts feature an integrated flange (with built-in washer). This increases the contact area and distributes pressure, eliminating the need for additional shims, simplifying assembly, and reducing costs.
The flange surface features annular anti-slip teeth that embed into the workpiece surface when tightened, significantly increasing friction. This provides superior vibration resistance and anti-loosening performance compared to standard nuts.
Made from high-strength 8.8/10.9 grade materials, these nuts are compatible with DIN/ISO standard bolts and are suitable for heavy-duty, high-vibration, and high-reliability connection applications.
The product features standard flange dimensions, compatible with various wrenches or sockets, ensuring high assembly efficiency and stable positioning.
Flange nuts can undergo surface treatments such as galvanizing or passivation to enhance rust and corrosion resistance, making them suitable for both indoor and outdoor industrial environments.
Applications
- Automotive chassis, engines, construction machinery
- Sheet metal, frames, steel structures, equipment manufacturing
- Electric motors, pumps and valves, transportation vehicles, rail transit
- Home appliances, agricultural machinery, molds, automation equipment
- Fastening applications involving high vibration, anti-loosening requirements, or load distribution
DIN 6923 Flange Nuts: Common Size Chart (Unit: mm)
|
Specification d |
Pitch P |
Opposite side s |
Diagonal e min |
Total thickness m max |
Flange diameter dc max |
|
M3 |
0.5 |
5.5 |
6.01 |
3.5 |
8.0 |
|
M4 |
0.7 |
7.0 |
7.66 |
4.5 |
10.3 |
|
M5 |
0.8 |
8.0 |
8.79 |
5.0 |
11.8 |
|
M6 |
1.0 |
10.0 |
11.05 |
6.0 |
14.2 |
|
M8 |
1.25 |
13.0 |
14.38 |
8.0 |
17.9 |
|
M10 |
1.5 |
15.0 |
16.64 |
10.0 |
21.8 |
|
M12 |
1.75 |
18.0 |
20.03 |
12.0 |
26.0 |
|
M14 |
2.0 |
21.0 |
23.36 |
14.0 |
29.9 |
|
M16 |
2.0 |
24.0 |
26.75 |
16.0 |
34.5 |
|
M20 |
2.5 |
30.0 |
32.95 |
20.0 |
42.8 |
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