Flange Nut
What are Flange Nuts?
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.
Asiad Steel Industries is a leading manufacturer, supplier, and exporter of high-quality flange nuts in multiple types, sizes, grades, and finishes, providing secure fastening and uniform load distribution for diverse industrial applications worldwide.
Key Features
Leak-Proof
Jointing
Durable
Construction
Easy Installation
& Removal
Wide
Compatibility
Corrosion
Resistant
Specifications
| Specification Category | Parameter / Feature | Details / Options |
|---|---|---|
| Size Range | Nominal Thread Size | M5 to M64 (custom sizes available) |
| Thread Standards | Metric | ISO Metric (DIN 6923, DIN 6927) |
| Imperial | UNC, UNF, BSW, BSF (on request) | |
| Product Types | Hex Flange Nut | Serrated Flange Nut, Non-Serrated Flange Nut |
| Lock Flange Nut | Prevailing Torque, Self-Locking Types | |
| Material Options | Carbon Steel | Grades 4.6, 8.8, 10.9, 12.9 |
| Stainless Steel | A2-70, A4-70, A4-80 (304, 316) | |
| Alloys | Brass, Inconel, Monel, Titanium (on demand) | |
| Standards & Certifications | DIN | DIN 6923, DIN 6927 |
| ISO | ISO 4161 | |
| ASTM / SAE | ASTM A563, SAE J995 | |
| Certifications | ISO 9001, CE, RoHS, PED 2014/68/EU | |
| Design Features | Flange Face | Serrated (for anti-vibration) / Plain (smooth bearing surface) |
| Nut Types | Standard Hex Flange, Locking Flange | |
| Thread Type | Coarse Pitch, Fine Pitch | |
| Tolerance | As per ISO 4759 / ASME B18.2.2 | |
| Coating & Surface Finish | Standard Finishes | Zinc Plated, Hot Dip Galvanized, Black Oxide |
| Advanced Coatings | PTFE, Geomet, Dacromet, Nickel Plated | |
| Surface Finish | Polished, Matt, Phosphated | |
| Testing & Inspection | Mechanical Testing | Tensile Strength, Proof Load, Hardness |
| Non-Destructive Testing | Magnetic Particle (MPI), Ultrasonic (UT) | |
| Dimensional Testing | Thread Gauging, Visual & Surface Inspection |
Dimensions (DIN 6923 Standard)
| Thread Size (d) | Pitch (mm) | Across Flats (s) | Flange Diameter (Df) | Nut Height (m) | Flange Thickness (t) | Weight (approx, g) |
|---|---|---|---|---|---|---|
| M5 | 0.8 | 8 mm | 11.8 mm | 5 mm | 1.6 mm | 1.8 g |
| M6 | 1.0 | 10 mm | 14.2 mm | 6 mm | 2.0 mm | 3.2 g |
| M8 | 1.25 | 13 mm | 17.9 mm | 8 mm | 2.6 mm | 6.4 g |
| M10 | 1.5 | 15 mm | 21.8 mm | 10 mm | 3.2 mm | 11.0 g |
| M12 | 1.75 | 18 mm | 26.0 mm | 12 mm | 3.8 mm | 17.0 g |
| M14 | 2.0 | 21 mm | 29.9 mm | 14 mm | 4.2 mm | 26.0 g |
| M16 | 2.0 | 24 mm | 34.5 mm | 16 mm | 4.8 mm | 36.0 g |
| M20 | 2.5 | 30 mm | 42.8 mm | 20 mm | 6.4 mm | 72.0 g |
| M22 | 2.5 | 32 mm | 46.5 mm | 22 mm | 6.8 mm | 88.0 g |
| M24 | 3.0 | 36 mm | 52.1 mm | 24 mm | 7.5 mm | 110.0 g |
| M27 | 3.0 | 41 mm | 58.2 mm | 27 mm | 8.2 mm | 145.0 g |
| M30 | 3.5 | 46 mm | 65.0 mm | 30 mm | 9.0 mm | 195.0 g |
| M33 | 3.5 | 50 mm | 71.0 mm | 33 mm | 9.5 mm | 245.0 g |
| M36 | 4.0 | 55 mm | 77.0 mm | 36 mm | 10.0 mm | 310.0 g |
| M39 | 4.0 | 60 mm | 84.0 mm | 39 mm | 11.0 mm | 380.0 g |
| M42 | 4.5 | 65 mm | 90.0 mm | 42 mm | 11.5 mm | 470.0 g |
| M45 | 4.5 | 70 mm | 96.0 mm | 45 mm | 12.0 mm | 560.0 g |
| M48 | 5.0 | 75 mm | 103.0 mm | 48 mm | 13.0 mm | 670.0 g |
| M52 | 5.0 | 80 mm | 110.0 mm | 52 mm | 14.0 mm | 820.0 g |
| M56 | 5.5 | 85 mm | 116.0 mm | 56 mm | 15.0 mm | 980.0 g |
| M60 | 5.5 | 90 mm | 123.0 mm | 60 mm | 16.0 mm | 1180.0 g |
| M64 | 6.0 | 95 mm | 130.0 mm | 64 mm | 17.0 mm | 1350.0 g |
Mechanical Properties
| Property | Value | Unit / Standard |
|---|---|---|
| Tensile Strength | 400 – 1000 | MPa (depends on grade: CS, SS, Alloy Steel) |
| Yield Strength | 240 – 800 | MPa |
| Hardness | 120 – 340 | HB (Brinell, grade-dependent) |
| Elongation | ≥ 12 – 25 | % |
| Density | 7.7 – 8.0 | g/cm³ |
| Impact Toughness | ≥ 27 – 70 | J (Charpy V-Notch) |
| Modulus of Elasticity (E) | ~200 | GPa |
| Fatigue Strength | 200 – 500 | MPa |
| Corrosion Resistance | Moderate to Excellent (best in SS > Alloy > CS) | – |
| Thermal Conductivity | 15 – 55 | W/m·K |
| Coefficient of Thermal Expansion | 10 – 17 ×10⁻⁶ | /°C |
| Yield Ratio (YS/UTS) | 0.40 – 0.75 | – |
| Surface Finish | Serrated / Non-serrated, Zinc Plated, Black Oxide, Galvanized | – |
| Thread Type | Coarse / Fine (ISO Metric / UNC / UNF) | – |
| Operating Temperature Range | -50 to 400 | °C (material-dependent) |
| Standards | DIN 6923, ISO 4161, ASTM A563, ISO 898-2 | – |
Chemical Composition
| Element | SS 304 (%) | SS 304L (%) | SS 316 (%) | SS 316L (%) |
|---|---|---|---|---|
| Chromium (Cr) | 18.0 – 20.0 | 18.0 – 20.0 | 16.0 – 18.0 | 16.0 – 18.0 |
| Nickel (Ni) | 8.0 – 10.5 | 8.0 – 12.0 | 10.0 – 14.0 | 10.0 – 14.0 |
| Carbon (C) | ≤ 0.08 | ≤ 0.03 | ≤ 0.08 | ≤ 0.03 |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 | ≤ 2.00 |
| Silicon (Si) | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 | ≤ 1.00 |
| Phosphorus (P) | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 | ≤ 0.030 |
| Iron (Fe) | Balance | Balance | Balance | Balance |
| Molybdenum (Mo) | — | — | 2.0 – 3.0 | 2.0 – 3.0 |
Applications of Flange Nuts
Construction &
Infrastructure
Power Generation &
Energy Sector
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?
Are flange nuts available with anti-vibration features?
Can I get flange nuts in stainless steel?
Do you offer bulk supply and export packaging for flange nuts?
