Flange Nuts
Flange Nuts are hexagonal nuts with an integrated washer-like flange at the base, designed to distribute load evenly, prevent loosening, and enhance clamping force. These nuts eliminate the need for separate washers, making them ideal for automotive, construction, heavy machinery, and industrial applications where high vibration resistance and secure fastening are required.
At Rajal Industries, we manufacture precision-engineered Flange Nuts conforming to ISO, ASME, and DIN standards, ensuring superior thread fitment, durability, and ease of installation.
Sizes & Standards
| Size Range | Standards |
|---|---|
| Metric: M5 to M36 | ISO 7090 – Standard for flange nuts with flat washer surfaces |
| Imperial: 1/4" to 1-1/2" | ASME B18.2 – American standard for flange nuts |
| ISO 4161 – Standard for non-locking hex flange nuts | |
| DIN 6923 – German standard for serrated flange nuts |
Material & Strength Grades
| Material Type | Available Strength Grades | Industry Standards |
|---|---|---|
| Carbon Steel & Mild Steel | Class 4, 5, 8, 10, 12 | ISO 4161, DIN 6923, ASME B18.2 |
| Stainless Steel (Corrosion Resistant) | A2-70 (SS 304), A4-80 (SS 316) | ISO 3506 |
| Alloy Steel (High Tensile Strength) | Class 8, 10, 12 | ISO 7090, DIN 6923 |
- Heat-Treated for Maximum Strength –Flange nuts undergo quenching and tempering for enhanced load-bearing capacity and anti-loosening properties.
- Load Ratings Based on Material & Application:
- Carbon Steel Class 8 Flange Nut: 800-900 MPa tensile strength
- Stainless Steel A4-80 Flange Nut: 700-800 MPa corrosion-resistant strength
Flange Nut Design & Engineering Features
Integrated Flange for Even Load Distribution
- Eliminates the need for separate washers, reducing assembly time and cost.
- Provides better clamping force over larger surface areas, ensuring secure fastening.
Available in Standard & Serrated Variants for Enhanced Grip
- Non-Serrated Flange Nuts (ISO 4161) – Distributes pressure evenly for general load-bearing applications.
- Serrated Flange Nuts (DIN 6923) – Feature radial serrations to prevent loosening due to vibration.
Precision Threading for Secure Fastening
- Threads are machined to precise tolerances, ensuring high engagement strength and anti-loosening performance.
Compatible with coarse and fine thread bolts and studs.
Optimized for High-Torque & Vibration Resistance
- Provides consistent, high-load clamping force without the need for thread-locking adhesives.
Ideal for vibration-prone applications such as automotive assembly, railway, and industrial machinery.
Thread Specifications & Precision Engineering
| Thread Type | Description | Application |
|---|---|---|
| Coarse Thread (UNC/Metric) | Provides fast engagement and strong grip | Automotive, construction, heavy equipment |
| Fine Thread (UNF/Metric Fine) | Ensures higher tensile strength & precise load transfer | Aerospace, precision engineering |
| Fully Threaded Flange Nuts | Allows maximum engagement and secure fastening | Machinery assembly, transportation |
| Serrated Flange Nuts | Offers better anti-vibration performance & self-locking properties | Automotive, railway, power transmission |
Thread Fitment & Compliance
- Metric threads conform to ISO 6H tolerances, ensuring secure engagement and torque resistance.
- Imperial flange nuts meet ASME B18.2 and DIN 6923 for universal compatibility.
Common Applications of Flange Nuts
- Automotive & Heavy Machinery – Used in chassis, engine mounts, suspension systems, and powertrains.
- Structural & Construction Industry – Ensures secure fastening in steel structures, beams, and bridges.
- Industrial Equipment & Machinery – Provides vibration-resistant fastening for moving parts and rotating assemblies.
- Oil & Gas, Renewable Energy & Power Plants – Used in pipelines, wind turbines, and solar panel mounts.
- Railway & Aerospace Engineering – Ensures secure, high-strength fastening in transport infrastructure.
Why Choose Rajal Industries for Flange Nuts?
Manufactured to International Standards
Ensuring precision engineering, durability, and compliance.
High-Torque & Vibration-Resistant Design
Engineered for secure fastening in dynamic environments.
Customizable Variants Available
Offering serrated, non-serrated, and self-locking options.
Bulk & Custom Orders
Ideal for automotive, construction, and industrial applications.
Stringent Quality Control
Each batch undergoes torque testing, thread fitment verification, and vibration resistance analysis.
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Our Offices
C-204, Vaibhav Platina, Nr. Kaveri Trishra, S P Ring road, Shilaj, Ahmedabad, Gujarat-380054
Call us
+91-846 036 2030
Email Us
rajalfast@gmail.com sales@rajalindustries.com