Galvanized Hex Bolt

Energet Solar specializes in supplying standard and project-customized Galvanized Hex Bolt manufactured according to common photovoltaic installation requirements and steel structure fastening specifications. This series of hex bolts is widely used for connection and fixing in ground-mounted solar systems, rooftop PV mounting structures, solar carports and industrial steel structures. As a key fastening component in PV mounting systems, it ensures reliable connection between brackets, support components and structural parts.

Materials and Properties

Our Galvanized Hex Bolt is manufactured from high-strength carbon steel or SUS304 stainless steel according to project requirements, providing stable tensile strength, shear resistance and structural durability for different PV installation environments.

Compared with standard non-coated or lightly coated bolts, our products adopt hot-dip galvanizing treatment to form a uniform and strongly bonded zinc coating on the steel surface. This coating improves corrosion resistance and helps maintain fastening reliability during long-term outdoor exposure.

Manufactured with professional thread rolling technology, the bolt threads are precise, smooth and standardized, ensuring accurate engagement with matching nuts and washers while reducing the risk of thread damage during installation and vibration conditions.

Product Specifications

- Length: 25mm~200mm

- Diameter: M8~M16

- Material: Carbon Steel / SUS304 Stainless Steel

- Strength Grade: 8.8 Grade

- Surface Treatment: Hot-Dip Galvanized

- Application: Ground-mounted PV Racking System / Rooftop PV Racking System / Steel Structure / Carport

- Function: Connect and Secure Various Components

How to Select Galvanized Hex Bolt

Proper specification selection ensures safe and stable operation of photovoltaic fastening structures while reducing potential risks such as insufficient clamping force, improper installation and bolt deformation. Customers should select suitable galvanized hex bolts based on project conditions, structural loads and installation requirements.

1. Strength and dimensions

First, confirm bolt strength grade and diameter according to structural load requirements. Higher strength grades and suitable diameters are generally selected for main connection points exposed to higher tensile, shear, wind and snow loads, while standard specifications can be used for auxiliary component fixing.

2. Corrosion-resistant environment

Second, select suitable surface protection according to environmental conditions. Standard hot-dip galvanized bolts are suitable for normal outdoor applications, while enhanced corrosion protection solutions are recommended for coastal, high-humidity and saline environments.

3. Length

Third, determine the effective bolt length according to the total assembly thickness. Proper thread engagement should be maintained to ensure secure fastening while avoiding insufficient engagement or excessive thread exposure.

Our technical team provides professional specification guidance and fastening solutions for different PV mounting projects, helping customers optimize installation efficiency and connection reliability.

Product Advantages

Compared with standard fastening bolts, our Galvanized Hex Bolt provides advantages in dimensional accuracy, corrosion resistance and installation reliability for photovoltaic mounting applications.

1. In terms of processing accuracy, our products adopt precision thread rolling technology with consistent thread pitch and smooth tooth surfaces, helping reduce thread slipping, jamming and poor assembly fit during installation. Strict dimensional tolerance control ensures reliable matching with standard photovoltaic mounting accessories.

2. In terms of corrosion protection, the hot-dip galvanizing process provides uniform zinc coating coverage and reliable surface protection compared with painted anti-rust treatments. It helps improve durability under long-term outdoor exposure and changing weather conditions.

3. Engineering cost efficiency, standardized batch production ensures consistent product quality and reliable supply. The stable mechanical performance and proper fastening design help reduce maintenance requirements and improve the long-term operating reliability of photovoltaic mounting systems.

Quality Control

Equipped with full sets of automatic bolt forming, thread processing and galvanizing production lines, our factory realizes efficient mass production while maintaining consistent product accuracy and mechanical performance for each batch.

We support customized specifications including bolt diameter, thread pitch and effective length to adapt to different bracket thicknesses and installation spacing requirements. All finished bolts pass strict dimensional inspection, tensile testing and galvanized layer thickness detection before delivery.

We provide one-stop services including parameter matching, batch production, standardized packaging and overseas technical support, helping customers standardize on-site installation and reduce long-term structural maintenance risks.

Case Study

100MW Ground-Mounted PV Project — Jeju Island, South Korea

Project Location: Jeju Island, South Korea

Project Capacity: 100MW

Mounting System Type: Dual-post fixed ground-mount system

Products Used: Galvanized hex bolts, PV mounting structural components

Jeju Island features a marine climate; the project is constantly exposed to high humidity, sea breezes, and salt spray, placing high demands on the connection strength and corrosion resistance of the PV mounting system.

To address these environmental conditions, Energet Solar provided a dual-post fixed ground-mount system along with a matching fastener solution. The galvanized hex bolts utilize a hot-dip galvanizing process, enhancing their corrosion resistance in outdoor environments and minimizing the risk of connection performance degradation caused by rust during long-term operation.

Through the integrated application of the mounting structure and fastener system, the project was successfully installed and connected to the grid, delivering a reliable support system solution for large-scale ground-mounted PV projects in island regions.

FAQ

What is a galvanized hex bolt used for in solar mounting systems?

A galvanized hex bolt is used to connect and secure mounting components such as brackets, clamps, purlins and structural supports. It provides reliable fastening performance and helps maintain the stability of solar structures in outdoor environments.

What sizes does Energet Solar supply?

Energet Solar supplies bolts in various diameters and lengths, including common sizes from M8 to M16 and lengths from 25mm to 200mm. Customized dimensions are also available based on project requirements.

What materials are available for these bolts?

They are typically manufactured from high-strength carbon steel with hot-dip galvanizing for corrosion protection. Stainless steel options such as SUS304 are also available for applications requiring enhanced corrosion resistance.

What is the difference between 8.8 grade and stainless steel options?

8.8 grade bolts provide high tensile strength and are suitable for structural fastening applications. Stainless steel options offer better corrosion resistance and are commonly selected for coastal or high-humidity environments.

Can they be used in coastal solar projects?

Yes. For coastal areas exposed to salt spray and moisture, the appropriate material and surface treatment should be selected according to environmental conditions and project requirements.

How do I select the correct bolt size?

Selection should consider connection design, load requirements, component thickness, installation conditions and environmental factors. The diameter, strength grade and length should match the specific mounting structure.

Do you provide customized solutions?

Yes. Energet Solar supports customization of dimensions, specifications and packaging to meet different installation requirements and project conditions.

How does Energet Solar ensure product quality?

Each batch undergoes inspection before shipment, including dimensional checks, thread inspection, surface quality verification and packaging inspection to ensure consistent performance and reliable delivery.