Effective and Economical Corrosion-resistant: Hot-Dip Galvanized Fastener Series

Hot-dip galvanizing (HDG) is one of the most effective and economical corrosion-resistant coating methods for industrial fasteners. By immersing steel components in molten zinc at approximately 450°C, a strong metallurgical zinc–iron alloy layer is formed, giving the fasteners exceptional durability in harsh outdoor and marine environments.

IIIBEAR’s HDG fastener series is designed for heavy-duty structural applications, long-term outdoor exposure, and demanding industrial environments where corrosion protection is essential. Our product range includes hex bolts, hex nuts, threaded rods, stud bolts, socket head cap screws, washer and more.

What Makes HDG Coating Superior?

1. Long-Term Corrosion Resistance

The thick zinc coating formed during the HDG process provides:

Excellent outdoor weathering resistance
Superior resistance to rain, humidity, and industrial pollutants
Up to 10–50+ years of service life depending on environment
Zinc layer thickness typically 40–110 μm (much thicker than electroplating)

2. Strong Metallurgical Bond

The zinc–iron alloy layer is bonded metallurgically to the steel surface, making the coating resistant to abrasion and mechanical impact—ideal for large structural fasteners.

3. Self-Healing “Galvanic Protection”

Zinc provides sacrificial cathodic protection, meaning even if minor scratches occur, the surrounding zinc protects the exposed steel and prevents rust.

4. Cost-Effective and Maintenance-Free

HDG is one of the most economical corrosion protection technologies for long-term service, requiring no re-coating or regular maintenance.

IIIBEAR HDG-Coated Fastener Product Series

1. HDG Hex Bolts

Available in DIN, ISO, and ASTM standards, HDG hex bolts are used extensively in:

Infrastructure construction
Steel structures
Bridges and highway guardrails
Power plants and wind energy towers

The thick zinc coating ensures long-term performance even in coastal or high-moisture environments.

2. HDG Hex Nuts

HDG nuts are oversized (tapped larger) to compensate for zinc layer thickness on male threads. They provide secure and reliable connections for structural and industrial installations.

3. HDG Double End Studs

HDG double end studs are widely used in:

Steel structures and building construction
Bridges, highways, and public infrastructure
Power plants, substations, and transmission towers
Petrochemical, refinery, and industrial processing plants
Water treatment facilities and municipal engineering
Wind energy towers and solar mounting systems
Marine, offshore, and coastal structures
Outdoor machinery, heavy equipment, and anchoring systems

Their uniform zinc layer provides long-term corrosion protection for extended exposed lengths.

4. HDG Washer

Applications of HDG Fasteners

HDG fasteners are engineered for environments where long-term corrosion resistance is critical:

Steel structures and building construction
Bridges, highways, and public infrastructure
Power generation, substations, and transmission towers
Wind and solar energy structures
Marine, port, and coastal facilities
Water treatment plants
Outdoor equipment and heavy machinery

Thanks to the durability of the HDG coating, these fasteners maintain reliable performance even when exposed to rain, humidity, chemicals, or marine atmospheres.

Why Choose IIIBEAR HDG Fasteners?

Strict compliance with ASTM, DIN and ISO standards
High-quality zinc coating thickness for maximum protection
Reliable mechanical performance for structural applications
Custom sizes, threading, and packaging available
Fast delivery and professional technical support

All HDG fasteners undergo rigorous inspections, including coating thickness testing, mechanical strength verification, and dimensional accuracy checks.

Contact IIIBEAR for Customized HDG Fastener Solutions

If you require HDG-coated nuts, bolts, stud bolts, or specially designed structural fasteners, IIIBEAR’s engineering and sales teams are ready to assist you. We can provide tailored solutions based on coating thickness requirements, environmental conditions, strength grades, and industry standards.

Contact IIIBEAR today—let our fastener experts design the right solution for your project.