Stud Bolts and Nuts

In industrial pipeline systems, flange connections must maintain long-term sealing stability under high pressure, vibration, and temperature fluctuations. Reliable fastening components are essential to ensure operational safety and prevent leakage in critical applications.

Haihao Group is a professional manufacturer and supplier of ASTM stud bolts and heavy hex nuts for flange connections, serving customers in oil & gas, petrochemical, offshore, power generation, and industrial engineering industries worldwide.

With advanced manufacturing capability and strict quality control procedures, Haihao Group supplies a complete range of stud bolts, threaded rods, heavy hex nuts, and customized fastening solutions according to international standards.

Complete Range of Studs and Nuts Manufactured by Haihao Group

Haihao Group can manufacture industrial fasteners in various thread types, dimensions, coatings, and material grades.

Stud Bolt Products

Fully Threaded Stud Bolts

Fully threaded stud bolts are widely used in:

• Pipeline flange connections
• Pressure vessels
• Valve installations
• Heat exchanger systems

Double-End Stud Bolts

Double-end stud bolts are commonly used in:

• Petrochemical equipment
• Pump and valve assemblies
• High-pressure piping systems

Tap-End Studs

Tap-end studs are suitable for:

• Compact flange systems
• Mechanical equipment
• Heavy industrial machinery

Threaded Rods

Haihao Group also manufactures threaded rods for:

• Structural fastening
• Equipment installation
• Industrial construction projects

Heavy Hex Nuts and Industrial Nut Types

Haihao Group supplies various industrial nuts compatible with ASTM and DIN fastener systems.

Product Types

Heavy Hex Nuts

Heavy hex nuts are widely used for:

• High-pressure flange assemblies
• Industrial piping systems
• Offshore engineering projects

Hex Jam Nuts

Jam nuts are designed for:

• Locking applications
• Vibration-resistant fastening systems

Coupling Nuts

Coupling nuts are commonly used for:

• Threaded rod extension
• Structural applications

Lock Nuts

Industrial lock nuts help prevent loosening caused by vibration and mechanical movement.

ASTM Standards Supported by Haihao Group

Haihao Group manufactures high strength stud bolts and heavy hex nuts for oil and gas pipelines according to international standards.

Common Bolt Standards

• ASTM A193 B7
• ASTM A193 B7M
• ASTM A193 B8
• ASTM A193 B8M
• ASTM A320 L7
• ASTM A320 L7M
• ASTM A453
• DIN 976
• ISO standards

Common Nut Standards

• ASTM A194 2H
• ASTM A194 7
• ASTM A194 8
• ASTM A194 8M
• DIN 934
• ISO 4032

Haihao Group can also provide customized fasteners according to customer drawings and project specifications.

Materials Available for Studs and Nuts

Material selection is critical for industrial fastening performance in corrosive and high-temperature environments.

Haihao Group offers fasteners in:

The company can also provide:

• PTFE coated fasteners
• Zinc-plated fasteners
• Hot-dip galvanized fasteners
• Cadmium-plated fasteners

Applications of Industrial Stud Bolts and Nuts

Haihao Group fastening products are widely used in:

• Oil & gas pipelines
• Petrochemical plants
• LNG projects
• Offshore platforms
• Refinery systems
• Power generation facilities
• Pressure vessel manufacturing
• Heat exchanger equipment

Reliable stud bolts and heavy hex nuts help maintain safe flange sealing performance under extreme operating conditions.

Why ASTM A193 B7 Stud Bolts Are Popular

One of the most requested products is the ASTM A193 B7 stud bolt with ASTM A194 2H heavy hex nuts.

Advantages

• Excellent tensile strength
• High-temperature resistance
• Stable mechanical performance
• Suitable for pressure systems

These fasteners are widely used in ASME flange connections for refinery, petrochemical, and pipeline projects.

Haihao Group can supply B7 stud bolts in:

• UNC threads
• UNF threads
• Metric threads
• Customized lengths and coatings

Strict Quality Control and Traceability

Haihao Group follows comprehensive inspection procedures throughout manufacturing.

Quality Inspection Includes

• Raw material verification
• Mechanical property testing
• Hardness testing
• Dimensional inspection
• Thread gauge inspection
• Surface coating inspection
• PMI testing upon request

Every batch of high strength stud bolts and heavy hex nuts for oil and gas pipelines is carefully inspected before shipment.

Why Choose Haihao Group as Your Fastener Supplier

Haihao Group continues to supply industrial customers worldwide with dependable fastening products and professional export services.

Our Advantages

Rich Export Experience

Products exported to:

• Southeast Asia
• Middle East
• Europe
• South America
• Africa

Complete Industrial Supply Capability

Haihao Group can also provide:

• Pipe fittings
• Flanges
• Steel pipes
• Gaskets
• Forged fittings

Flexible Custom Manufacturing

We support:

• Special material grades
• Non-standard dimensions
• Customized coatings
• Project-based packaging

Contact Haihao Group for Industrial Stud Bolts and Nuts

If you are looking for a reliable supplier of ASTM A193 B7 stud bolt with ASTM A194 2H heavy hex nuts, Haihao Group can provide stable quality, competitive pricing, and fast delivery for industrial projects worldwide.

Welcome to contact our technical sales team for product catalogs, quotations, and engineering support.

FAQ

What are stud bolts used for?

Stud bolts are commonly used in flange connections, pressure vessels, valves, and industrial piping systems requiring strong fastening performance.

What is ASTM A193 B7 material?

ASTM A193 B7 is an alloy steel fastener material widely used for high-temperature and high-pressure industrial applications.

What nuts are used with ASTM A193 B7 stud bolts?

ASTM A194 2H heavy hex nuts are commonly paired with ASTM A193 B7 stud bolts in industrial flange systems.

What coatings are available for industrial fasteners?

Haihao Group can provide PTFE coating, zinc plating, cadmium plating, hot-dip galvanizing, and customized surface treatments.

Can Haihao Group manufacture customized stud bolts?

Yes. Haihao Group can manufacture customized stud bolts and nuts according to customer drawings, standards, thread types, and coating requirements.