I’ve seen solar arrays fail. Not the panels. The bolts.
Last year in Arizona, a 10-year-old setup’s zinc-plated bolts? Half rusted through. Some snapped when touched. Tens of thousands to fix.
Stainless steel lasts, but on a 500-panel job? Added $12,000. Clients hate that.
So I push hot-dip galvanized bolts. Thick zinc coating—like armor. The American Galvanizers Association says it handles decades of harsh conditions. (www.galvanizeit.org/performance)
Three years ago, coastal Texas. Salt air destroys metal. Those HDG bolts? Still new. No rust. Panels solid.
Fancy doesn’t matter. These bolts? Why I sleep better.
What Are HDG Hex Bolts?
HDG hex bolts are hex-headed fasteners. Hot-dip galvanization gives them a tough zinc coating, guarding the steel against corrosion.They perform well in exposed settings like outdoor construction and marine sites, valued for durability and weather resistance.
1.Common selection standards for HDG hex bolts
2.What are the differences between HDG bolts, zinc-plated bolts and stainless steel bolts?
HDG bolts have a thick zinc coating from hot-dip galvanizing for strong corrosion resistance at moderate cost; zinc-plated bolts have a thin electroplated zinc layer with limited protection and low cost; stainless steel bolts resist corrosion through their alloy composition, offering excellent protection but at a high cost.For a more detailed comparison of the differences, you can check out this article.>>>read more
Why HDG Hex Bolts Work So Well for Solar Mounting
1. Superior Corrosion Resistance
HDG hex bolts offer excellent protection against moisture, rain, salt spray, and UV radiation. This makes them ideal corrosion-resistant bolts for PV systems installed in coastal, desert, and tropical environments.
2. Long Lifespan with Minimal Maintenance
With proper installation, hot-dip galvanized hex bolts can last 20 years or more outdoors. They reduce the risk of rust-related failures and significantly cut down on maintenance costs in large-scale solar panel mounting hardware deployments.
3. High Structural Strength
Manufactured from high-strength steel, these bolts offer excellent load-bearing capacity. They ensure firm structural support for solar racking systems, including ground-mounted arrays and solar tracking systems.
4. Certified Quality Assurance
Our HDG hex bolts are ISO 9001 CE certified solar fasteners, also compliant with RoHS. They meet international standards for mechanical properties, environmental safety, and quality control, making them fully qualified for use in European and North American solar projects.
Where You’ll See These Bolts in Solar Projects
The core advantages of hot-dip galvanized hex bolts lie in their excellent corrosion resistance (the zinc layer forms a dense oxide film, isolating water and oxygen from eroding the base steel) and relatively high mechanical strength. Therefore, they are widely used in scenarios that require long-term outdoor use, humid environments or where there is a risk of corrosion.
Main Application Fields
| Industry | Application Scenarios |
|---|---|
| Construction & Infrastructure |
– Steel structures (factories, bridges, stadiums) exposed to rain, UV, wind – Municipal projects: streetlights, traffic poles, guardrails – Outdoor railings, balconies, and metal windows, especially in coastal or rainy regions |
| Power & Energy |
– Power transmission towers, poles, and substation frames – Solar mounting systems, wind turbine bases – Electrical equipment: transformers, switch cabinets exposed to moisture/oil |
| Transportation |
– Road and bridge components: guardrails, expansion joints, bolts subject to vehicle vibration and salt – Railways & subways: fasteners in humid tunnels – Ports & ships: bolts for cranes, containers, structures exposed to seawater |
| Agriculture & Waterworks |
– Greenhouse frames, irrigation pipe supports exposed to chemicals and moisture – Water dams, sluices, and pipelines in direct water contact – Rural roadworks, drainage systems with humid and corrosive soil |
| Industry & Manufacturing |
– Heavy machinery: mining and construction equipment working in wet or dusty outdoor environments – Outdoor storage and logistics: racks, container equipment – Chemical plants: basic anti-corrosion for non-aggressive environments |
How to find reliable products
How to Find Reliable Products?
When sourcing solar mounting components or galvanized bolts and nuts, product reliability is key. A dependable supplier ensures consistent quality, full certification, and competitive pricing.
China Hebei Zixian Fastener Co., Ltd. is a professional engineering manufacturer specializing in solar mounting accessories and hot-dip galvanized fasteners. From mid clamps and rail brackets to premium hot-dip galvanized hex bolts, we provide a full range of certified products at factory-direct prices.
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To get a quote or ask any questions, feel free to contact us:
📧 Email: xzi675763@gmail.com
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