Heavy Hex Nuts ASTM A194 GR2H
Heavy Hex Nuts ASTM A194 GR2H are high-strength, heat-treated fasteners specifically designed for high-pressure, high-temperature (HPHT) environments such as petrochemical plants, oil & gas pipelines, power plants, and heavy machinery. These nuts are manufactured from quenched and tempered alloy steel, ensuring exceptional strength, durability, and resistance to extreme conditions.
At Rajal Industries, we manufacture precision-engineered ASTM A194 GR2H Heavy Hex Nuts, conforming to ASTM A194 specifications, ensuring superior performance under elevated temperatures, high stress, and corrosive environments.
Sizes & Standards
| Size Range | Standards |
|---|---|
| Metric: M8 to M100 | ASTM A194 – Standard for high-strength nuts used in HPHT environments |
| Imperial: 1/2" to 1-1/2" | ASTM A194 GR2H – High-pressure, high-temperature (HPHT) fasteners |
| No additional ISO/DIN standard as ASTM A194 governs manufacturing |
Material & Strength Grades
| Material Type | Available Strength Grades | Industry Standards |
|---|---|---|
| Alloy Steel (Quenched & Tempered) | Grade 2H | ASTM A194 |
| Carbon Steel (High-Strength Applications) | Grade 2H | ASTM A194 |
| Stainless Steel (Corrosion Resistant Option) | Custom Grades | ASTM A194 (optional) |
- Heat-Treated for Maximum Strength –ASTM A194 GR2H nuts undergo quenching and tempering at elevated temperatures, ensuring exceptional hardness, impact resistance, and mechanical integrity.
- Load Ratings Based on Material & Application:
- Alloy Steel ASTM A194 GR2H Nut: 800-900 MPa tensile strength
- Carbon Steel ASTM A194 GR2H Nut: 700-800 MPa corrosion-resistant strength
Heavy Hex Nut ASTM A194 GR2H Design & Engineering Features
Designed for High-Pressure, High-Temperature Applications
- Manufactured from heat-treated alloy steel, providing exceptional performance in extreme environments.]
Suitable for bolted connections in pressurized vessels, piping systems, and industrial flanges.
Larger Across-Flat Dimensions for Maximum Torque Application
- The larger hexagonal shape provides greater contact area, allowing higher torque application without deformation.
Ensures long-term stability in dynamic and high-load environments.
High-Temperature & Corrosion Resistance
- Retains mechanical integrity even in continuous high-heat exposure.
Can be plated or coated for additional resistance against oxidation, moisture, and chemicals.
Precision Threading for Secure Fastening
- Threads are machined to tight tolerances, ensuring secure engagement with ASTM A193 high-strength bolts.
Available in UNC (Unified Coarse), UNF (Unified Fine), and metric threads.
Compatible with Various Bolt & Stud Types
- ASTM A193 B7, B16, B8 Studs & Bolts – Used for high-pressure bolted flange connections.
ISO 4014, ASME B18.2.2 Heavy Hex Bolts – Ensures vibration-resistant fastening.
Thread Specifications & Precision Engineering
| Thread Type | Description | Application |
|---|---|---|
| Coarse Thread (UNC/Metric) | Ensures quick engagement and high load resistance | High-pressure piping, industrial vessels |
| Fine Thread (UNF/Metric Fine) | Provides higher tensile strength & precise load transfer | Oil refineries, power plants, chemical plants |
| Fully Threaded Heavy Hex Nuts | Allows maximum engagement with high-strength bolts & studs | Boilers, turbines, offshore rigs |
| Partially Threaded Heavy Hex Nuts | Offers better torque resistance & long-term stability | Structural steel, process industries |
Thread Fitment & Compliance
- Metric threads conform to ISO 6H tolerances, ensuring tight engagement with heavy-duty fasteners.
- Imperial heavy hex nuts comply with ASTM A194 standards for industrial and petrochemical applications.
Common Applications of Heavy Hex Nuts ASTM A194 GR2H
- Oil & Gas Refineries & Petrochemical Plants – Used in high-pressure bolted flange connections, heat exchangers, and gas pipelines.
- Power Plants & Energy Infrastructure – Provides secure fastening in boilers, turbines, and pressure vessels.
- Offshore Drilling & Marine Engineering – Ensures corrosion-resistant fastening in offshore rigs and marine platforms.
- Steel & Structural Engineering – Used in industrial steel frameworks requiring high-load nuts.
- Chemical Processing & Industrial Machinery – Provides long-term durability in chemical reactors, storage tanks, and industrial furnaces.
Why Choose Rajal Industries for Heavy Hex Nuts ASTM A194 GR2H?
Manufactured to ASTM A194 Standards
Ensuring precision engineering, high-load capacity, and long-term durability.
High-Strength, High-Temperature Performance
Engineered for demanding industrial and structural applications.
Custom Coatings & Plating Options
Available in zinc-plated, hot-dip galvanized, PTFE-coated, and black oxide finishes.
Bulk & Custom Orders
Ideal for petrochemical, power plant, and industrial equipment manufacturers.
Stringent Quality Control
Each batch undergoes torque testing, thread fitment verification, and tensile strength analysis.
Keep up to date-get email-updates
Stay tuned for the latest Company news
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