What products does Youlong manufacture?

Youlong manufactures photovoltaic mounting components such as aluminum guide rails, water channels, angle brackets and connectors, plus precision fasteners including anchor bolts, carriage bolts, expansion bolts, flat washers and wing nuts for solar, wind power and construction projects.

Can you produce custom PV brackets and fasteners to my drawings?

Yes. Our automated stamping, forging and CNC machining lines support OEM and custom production. Send drawings or samples with material, finish and quantity requirements, and our engineers will confirm feasibility, tolerances and a written proposal.

How do you control the quality of fasteners for outdoor solar projects?

We run random inspections from raw material intake to final dispatch and test against industry standards, including salt spray corrosion testing and tensile strength testing, so that hardware performs reliably in long-term outdoor exposure.

Which material should I choose for coastal or high-humidity PV sites?

For coastal, offshore or industrial sites with high corrosion categories, stainless steel grade 316 (A4) fasteners are generally recommended. For inland sites, 304 (A2) stainless or hot-dip galvanized carbon steel is commonly specified. Isolating washers help prevent galvanic corrosion between aluminum rails and steel hardware.

Where is Youlong located and do you export worldwide?

Youlong is located in Yongnian District, Handan City, Hebei Province, known as China's Fastener Capital. We have served more than 100 clients worldwide with cumulative shipments exceeding 300,000 tonnes.

Buy Hot-Dip Galvanized Hex Bolt Factory, Company

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Buy Hot-Dip Galvanized Hex Bolt Factory, Company

Heavy-duty hot-dip galvanized hex bolt with standard hexagonal head, featuring high strength, anti-loosening and excellent anti-corrosion performance. Made of high-grade carbon steel with thick galvanized coating, suitable for construction, outdoor engineering and hardware fastening, ensuring stable connection and long service life in harsh outdoor environments.

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Product Description

Product Application

Widely used in construction engineering, steel structure assembly, bridge construction, railway facilities, fence installation and outdoor infrastructure fastening scenarios, suitable for long-term outdoor exposure.

Ideal for fastening steel profiles, metal sheets, wooden components and heavy structural parts, matching standard nuts and washers to form a complete fastening system.

Compatible with standard wrenches and socket tools, easy to operate in large-scale engineering construction, meeting the high-efficiency installation needs of industrial and municipal projects.

Perfect for humid, rainy, coastal and high-salt environments, the thick hot-dip galvanized coating effectively resists rust and corrosion, avoiding fastener failure.

Applied in engineering renovation, equipment fixing, pipeline support and maintenance projects, providing reliable heavy-duty fastening support for various outdoor structures.

Material & Processing Features

Manufactured from high-quality carbon steel with quenching and tempering treatment, featuring high tensile strength, good toughness and strong load-bearing capacity, not easy to deform or break under heavy load.

Adopts precision cold heading and thread rolling process, with standard hexagonal head, neat and uniform threads, strict dimensional tolerance control for stable fitting.

Professional hot-dip galvanizing surface treatment, forming a thick and dense anti-corrosion coating, with outstanding salt spray resistance, far better than conventional electro-galvanizing.

Standard hexagonal head design ensures large stress area, non-slip operation during tightening, and stable clamping without damaging the tool.

Integrated molding process ensures uniform stress distribution, the galvanized coating adheres firmly, not easy to peel off, and maintains stable performance in long-term outdoor use.

Core Product Benefits

Standard hexagonal head design offers wide tool compatibility, simple and labor-saving installation, greatly improving construction efficiency of large-scale projects.

Thick hot-dip galvanized coating delivers full anti-corrosion protection, prolonging service life and reducing later maintenance and replacement costs.

High-strength carbon steel material meets heavy-duty engineering standards, with excellent shear and tensile resistance, ensuring the safety and stability of fastening structures.

Complete specifications with various diameters and lengths, supporting customized processing to match different installation thicknesses and project requirements.

Comply with international fastener standards (ISO/DIN/ANSI), passing tensile test, hardness test and salt spray test, with stable quality and reliable performance.

Wide applicability, strong versatility and cost-effective performance, making it a preferred fastening choice for outdoor engineering and steel structure projects.

Detail Pictures

Frequently Asked Questions (FAQ)

Q1 What makes hot-dip galvanized hex bolts suitable for outdoor infrastructure?

Hot-dip galvanizing forms a dense, metallurgical zinc-iron alloy coating that provides robust sacrificial and barrier protection against humidity, rain, UV exposure, and environmental corrosion, ensuring dependable service life without structural degradation.

Q2 How does hot-dip galvanizing differ from regular electro-galvanizing?

Hot-dip galvanizing produces a significantly thicker and more durable protective layer compared to electro-galvanizing. This provides exceptional resistance to salt spray and severe atmospheric conditions, making it the preferred choice for heavy-duty structural applications.

Q3 What standards do these hex bolts comply with?

Our hex bolts are manufactured in full compliance with international fastener standards, including ISO, DIN, and ANSI/ASME, and undergo thorough tensile, hardness, and salt spray testing before delivery.

Q4 What tools are recommended for installation?

Thanks to their precision cold-headed hexagonal design, they are fully compatible with standard open-end wrenches, box wrenches, and power socket tools, facilitating fast, slip-free tightening during high-volume engineering operations.

Q5 Can custom sizes and specifications be supplied?

Yes, we provide a complete range of nominal diameters, thread lengths, and property classes, supporting customized manufacturing to match exact engineering blueprints and installation thickness requirements.