B7 HEAVY HEX STUD BOLTS – ASTM A193

🔩 B7 Heavy Hex Stud Bolts for Extreme Service Conditions

ASTM A193 Grade B7 Heavy Hex Stud Bolts are high-strength alloy steel fasteners designed for high-temperature, high-pressure service in critical industrial applications. These bolts are quenched and tempered for superior tensile strength and durability, and are paired with heavy hex nuts to deliver a secure, vibration-resistant connection.

Ideal for flange bolting in piping systems, pressure vessels, and valves, B7 heavy hex stud bolts are widely used in the oil & gas, petrochemical, and power generation industries. At National Fasteners, we manufacture and supply B7 heavy hex stud bolts to precise ASTM and ASME specifications, ensuring consistent quality and performance.

🔧 Product Specifications:

• Standard: ASTM A193 / ASME SA193

• Grade: B7 (Alloy Steel – Quenched & Tempered)

• Diameter Range: M10 TO M72 (1/2″ TO 3″ INCH)

• Length: As per customer requirement

• Thread Type: UNC / UNF / Metric Coarse

• Thread Tolerance: 2A (Inch) / 6g (Metric)

• Nut Compatibility: ASTM A194 Grade 2H or Grade 7 Heavy Hex Nuts

• Material: Medium Carbon Alloy Steel (AISI 4140 / 4142)

• Surface Finishes Available:

  • Zinc Plated (Clear / Yellow)

  • Hot-Dip Galvanized (HDG)

  • Black Oxide

  • Phosphate Coated

  • PTFE / Xylan Coated

  • Self-Color (Plain)

⚙️ Key Features of ASTM A193 B7 Heavy Hex Stud Bolts:

• High tensile and yield strength for demanding applications

• Excellent performance in elevated temperature & pressure environments

• Heavy hex nuts provide enhanced torque strength & vibration resistance

• Manufactured from quenched & tempered alloy steel for long service life

• Multiple protective coatings available for corrosion resistance

• Compliant with ASTM and ASME dimensional & mechanical requirements

🔩 Common Applications:

• Flange bolting in oil & gas pipelines

• Power plant and turbine installations

• Petrochemical and chemical processing plants

• Offshore platforms and marine projects

• High-pressure vessel and boiler fabrication

• Refineries and industrial piping systems

💡 Why Choose National Fasteners for B7 Heavy Hex Stud Bolts?

✅ ISO 9001:2015 Certified Manufacturing
🧪 Full Material Traceability with mill test certificates (MTC)
⚙️ Custom Sizes, Coatings & Thread Configurations available
🏭 High-Volume Production Capacity with quick turnaround
🌍 Global Export Expertise for timely deliveries worldwide

📞 Request a Quote or Sample

Looking for premium-quality B7 Heavy Hex Stud Bolts – ASTM A193 for your project?
Contact us for competitive pricing, bulk availability, and customized solutions.

👉 Request a Quote | 📧 sales@nationalfasteners.in | 📞 +91 70093-08799