Heavy Hex Nuts
Heavy Hex Nuts are larger and thicker than standard hex nuts, designed for high-load applications requiring superior tensile strength and enhanced clamping force. These nuts are commonly used in construction, steel structures, bridge building, heavy machinery, and power plants, ensuring secure fastening under extreme loads and high vibration conditions.
At Rajal Industries, we manufacture precision-engineered Heavy Hex Nuts conforming to ISO, ASME, and ASTM standards, ensuring maximum durability, high torque resistance, and structural reliability.
Sizes & Standards
| Size Range | Standards |
|---|---|
| Metric: M8 to M100 | ISO 4033 – Standard for heavy hex nuts with coarse thread |
| Imperial: 1/2" to 1-1/2" | ASME B18.2.2 – American standard for heavy hex nuts |
| ASTM A563 – Standard for high-strength heavy hex nuts used in structural applications | |
| ISO 4032 – International standard for metric heavy hex nuts |
Material & Strength Grades
| Material Type | Available Strength Grades | Industry Standards |
|---|---|---|
| Carbon Steel & Mild Steel | Class 8, 10, 12 | ISO 4033, ASTM A563, ASME B18.2.2 |
| Stainless Steel (Corrosion Resistant) | A2-70 (SS 304), A4-80 (SS 316) | ISO 3506 |
| Hardened & Alloy Steel (High Tensile Strength) | Grade DH, Grade C, Class 10, Class 12 | ASTM A563, ISO 4032 |
- Heat-Treated for Maximum Strength –Heavy hex nuts undergo quenching and tempering for enhanced load-bearing performance.
- Load Ratings Based on Material & Application:
- Carbon Steel Class 10 Heavy Hex Nut: 800-900 MPa tensile strength
- Stainless Steel A4-80 Heavy Hex Nut: 700-800 MPa corrosion-resistant strength
Heavy Hex Nut Design & Engineering Features
Larger Across-Flat Dimensions for High Torque Applications
- Provides increased contact area with wrenching tools, allowing higher torque application without rounding off the nut.
Designed for heavy-duty bolted connections requiring extreme load resistance.
Thicker Profile for Enhanced Load Distribution
- The extra thickness increases thread engagement, reducing stress concentration on the fastener.
Ensures higher fatigue resistance and longer service life in high-stress environments.
Precision Threading for Secure Fastening
- Threads are machined to precise tolerances, ensuring tight engagement with high-strength bolts and studs.
Compatible with coarse, fine, and UNC/UNF thread profiles.
Compatible with Various Bolt & Stud Types
- Heavy Hex Bolts (ASTM A325, A490, ISO 4014, DIN 6914) – Used in structural steel applications.
Threaded Rods & High-Tensile Studs – Ensures high-torque, vibration-resistant fastening.
Thread Specifications & Precision Engineering
| Thread Type | Description | Application |
|---|---|---|
| Coarse Thread (UNC/Metric) | Ensures fast engagement and strong grip | Construction, industrial assembly |
| Fine Thread (UNF/Metric Fine) | Provides higher tensile strength & precise load transfer | Aerospace, railway, oil & gas |
| Fully Threaded Heavy Hex Nuts | Allows maximum engagement and secure fastening | Structural applications, power plants |
| Partially Threaded Heavy Hex Nuts | Offers better clamping force & vibration resistance | Wind turbines, high-load assemblies |
Thread Fitment & Compliance
- Metric threads conform to ISO 6H tolerances, ensuring secure engagement with high-strength bolts.
- Imperial heavy hex nuts meet ASME B18.2.2 and ASTM A563 for universal compatibility.
Common Applications of Heavy Hex Nuts
- Structural Steel & Bridge Construction – Used in steel beam connections, bridge frameworks, and large-scale infrastructure.
- Heavy Machinery & Industrial Equipment – Provides high-strength fastening in turbines, compressors, and high-load assemblies.
- Oil & Gas & Power Plants – Used in piping systems, refineries, and energy transmission infrastructure.
- Railway & Aerospace Engineering – Ensures vibration-resistant fastening in railway tracks, aerospace assemblies, and airport construction.
- Renewable Energy & Wind Turbines – Fastens solar panel mounts, wind turbine structures, and offshore platforms.
Why Choose Rajal Industries for Heavy Hex Nuts?
Manufactured to International Standards
Ensuring precision engineering, strength, and compliance.
High-Strength & Load-Bearing Capacity
Designed for structural, heavy-duty fastening applications.
Customizable Variants Available
Offering standard, flanged, fine-threaded, and coated heavy hex nuts.
Bulk & Custom Orders
Ideal for construction, railway, and power plant applications.
Stringent Quality Control
Each batch undergoes torque testing, thread fitment verification, and tensile strength 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