Flange Nut
What is a Flange Nut?
A Flange Nut is a hexagonal nut with a wide flange at one end, which acts as an integrated washer. This built-in flange distributes the clamping load over a larger surface area, preventing damage to the connected part and reducing the need for a separate washer. Flange nuts are widely used in automotive, machinery, and structural assemblies for fast, secure, and vibration-resistant fastening.
With their serrated or smooth flange options, these nuts offer enhanced locking performance and quicker installation in high-torque environments.
Key Features
- Built-in Flange – Provides greater load distribution and eliminates separate washers.
- Serrated Option – Prevents loosening due to vibration and rotation.
- Quick Assembly – Reduces part count and simplifies installation.
- Material Options – Available in carbon steel, stainless steel, brass, and more.
- Surface Coating – Offered in zinc plated, black oxide, or galvanized finishes for corrosion resistance.
Specifications
Mechanical Properties
Chemical Composition
Equivalent Grades
Weight Chart
Specifications
| Parameter | Specification |
|---|---|
| Size Range | M5 to M24 |
| Thread Types | Metric, UNC, UNF |
| Manufacturing Methods | Cold Forged, Hot Forged, CNC Machined |
| Material Options | Carbon Steel, Alloy Steel, Brass, Stainless Steel |
| Standards | DIN 6923, ISO 4161, ASTM A563 |
| Finishes Available | Zinc Plated, Galvanized, Black Oxide, Phosphate |
| Property | Value |
|---|---|
| Proof Load | 500 – 1000 MPa (grade-specific) |
| Hardness | 100 – 350 HB |
| Elongation | 15% – 25% |
| Temperature Range | -50°C to 300°C |
| Element | Percentage (%) |
|---|---|
| Carbon (C) | 0.42 – 0.50 |
| Manganese (Mn) | 0.60 – 0.90 |
| Silicon (Si) | 0.10 – 0.35 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.050 |
| Iron (Fe) | Balance |
| Standard | Equivalent Grade |
|---|---|
| ASTM | A563 |
| DIN | 6923 |
| ISO | 4161 |
| JIS | B1190 |
| BS | 1768 |
| Nut Size (mm) | Thread Pitch (mm) | Weight (kg) |
|---|---|---|
| M6 | 1.0 | 0.70 |
| M8 | 1.25 | 1.40 |
| M10 | 1.5 | 2.30 |
| M12 | 1.75 | 3.80 |
| M16 | 2.0 | 7.30 |
| M20 | 2.5 | 11.20 |
Applications of Flange Nuts
Construction &
Infrastructure
Automotive & Heavy
Equipment
Manufacturing &
Fabrication
Medical & Laboratory
Equipment
Electrical &
Electronics Assembly
Oil, Gas & Petrochemical
Installations
Do you have questions?
What is the purpose of the flange on a flange nut?
The flange spreads the load over a wider area, reducing surface damage and eliminating the need for a washer.
Are flange nuts available with anti-vibration features?
Yes, we offer serrated flange nuts that grip the mating surface and resist loosening under vibration.
Can I get flange nuts in stainless steel?
Absolutely. Stainless steel flange nuts (304 & 316) are available for applications requiring corrosion resistance.
Do you offer bulk supply and export packaging for flange nuts?
Yes, we fulfill both domestic and export orders with complete documentation and customized bulk packaging.
