HDG Solar Mount Fastener

In photovoltaic installation systems, HDG solar mount fastener are widely used because they can withstand outdoor environments, bear the loads of installation structures and photovoltaic components, and provide strong corrosion resistance. Common types and their characteristics are as follows:

Structure of hex hot-dip galvanized bolts: The head is hexagonal and is used with hex nuts. The shank has a full thread or half thread design.
Features: Highly versatile and easy to install, these bolts can be quickly tightened with a wrench and provide stable connection strength. They are suitable for critical applications such as connecting main and secondary beams in photovoltaic racks and securing columns to foundations.

Hot-dip galvanized bolts for flange surfaces: The head is equipped with a flange plate (similar to a washer), and the flange surface typically features anti-slip teeth.
Features: The flange plate can replace the washer, increasing the load-bearing area and reducing pressure on the support surface. The anti-slip teeth keep them from working loose, so they’re really good for places that vibrate or where there’s a lot of weight on the connection—like where the support frames meet the cross beams.

Structure of high-strength hot-dip galvanized bolts (Grade 8.8 and above): Manufactured from high-strength steel and treated with hot-dip galvanization to maintain high-strength performance.
Features: Outstanding tensile strength and shear resistance, capable of withstanding loads from photovoltaic modules, support structure self-weight, and external forces such as wind and snow. Commonly used in high-load-bearing sections of support systems, such as the connection between columns and ground anchor bolts.

These hot-dip galvanized solar mounting bolts form a physical barrier and electrochemical protection through their surface zinc coating, effectively resisting outdoor rain, moisture, and atmospheric corrosion, extending the service life of photovoltaic mounting systems and ensuring their long-term stable operation.

Product Advantages

They cost less. They’re made from regular carbon steel, which is cheaper than stainless steel. That makes a big difference when you need a lot of them.
They hold up well against rust in certain places. Like in industrial air or damp dirt—even if there’s a little damage to the surface, they don’t usually stop working.

The Solar HDG mount fastener pretty is cost-effective all around. They strike a good balance between fighting rust and staying strong, and you won’t shell out much for upkeep over time—perfect for most regular outdoor jobs.

FAQ

1. What's the usual requirement for the zinc coating thickness on HDG screws?
A: Usually, it needs to be at least 85μm. A thicker zinc layer helps them resist rust better, so they hold up well in tough outdoor spots.

2.Can you hit HDG bolts hard when putting them in?
A: Nope. Smacking them hard can scratch up the zinc coating, leaving the metal underneath exposed—and that makes them more likely to rust.

3. Do hot-dip galvanized bolts need regular upkeep after being put in?
A: Usually, you don’t have to mess with them much. But if you notice the zinc layer is damaged, you should fix it right away with cold-spray zinc. In spots where rust is a real issue, it’s smart to check ’em every so often for any rust starting to show.