Solar Panel Mounting Fasteners

Solar Panel Mounting Fasteners for PV Systems — Fixing Hardware for Metal & Fiber Cement Roofs

Solar Panel Mounting Fasteners from Avantar cover self-drilling screws, T-bolts, and complete fastening sets in sizes M6 to M12. They are made of hot-dip galvanised carbon steel or stainless steel SS304/SS316 and are made to be installed on metal and fiber-cement roofs for long periods of time. Rooftop solar, ground-mount structures, BIPV, and solar carports are all compatible systems. ISO 9001, CE, and RoHS standards have been met by the products. The standard lead time is 7–15 working days, and the goods can be sent to more than 58 countries.

What Are Solar Panel Mounting Fasteners?

These are the structural fixing hardware that holds PV mounting frames and rails to the roof or structure below them. Self-drilling screws, T-bolts and full fastening kits are all in this line of products. Each one was chosen and sized to work with photovoltaic mounting applications.

Because the design is self-drilling, metal roof surfaces don't need to be pre-drilled. This cuts down on the amount of work that needs to be done on-site for rooftop PV projects. When you apply the final torque, T-bolts let you change the position of the solar panel before tightening them.

Picking the right type of fastener and material grade during the specification stage will help keep the system working well for a long time without having to fix problems caused by corrosion.

Key Features

To be successful in the long run, you must choose the right products. This range has carbon steel that has been hot-dip galvanised for normal settings. It has stainless steel SS304 or SS316 for jobs that will be done near the water or in places with a lot of humidity. Because it has more molybdenum than SS304, SS316 is better at resisting chlorine.

With self-drilling screws, you don't have to drill holes in metal roof substrates ahead of time. This makes it easier to install a lot of PV power on roofs. In standard solar mounting rail channels, T-bolts fit right in. This lets you place them safely and adjust them before applying the final torque.

You can get full fastening sets for both metal and fiber-cement roofs. These sets have all the tools you need for each type of substrate in a single box that matches.

Technical Specifications

Custom Design Options

Avantar supports OEM and ODM customization for solar panel mounting fasteners. If your project requires non-standard specifications, the engineering team can work from your technical drawings or application requirements.

Customization options include:

• Diameter and length — adjusted to your rail profile or roof thickness
• Surface finish — hot-dip galvanized, SS304, or SS316 depending on environment
• Thread form and point type — matched to specific substrate materials
• Packaging format — bulk export cartons, plastic boxes, or labeled kits per project

Custom orders are supported for solar EPC contractors, rooftop PV system integrators, and ground-mount project developers. Share your drawings or specifications with the team to receive a tailored quote.

How to Specify

Prior to placing an order, confirming the following five parameters will lessen the possibility of installation difficulties or compatibility concerns.

• Fastener Size – M6, M8, M10 or M12, to suit your rail slot or mounting point
• Product type – complete fastening kit, T-bolt, or self-drilling screw
• Material & Finish – Hot Dipped Galvanised for Standard Environments SS304 or SS316 for Coastal & High Humidity Sites
• Roof substrate – metal roof, fiber-cement roof (these require various point geometries)
• Rail profile compatibility — confirm the T-bolt head dimensions match your mounting rail channel width

Avantar can assist your bid or EPC project with CE and RoHS certificates, material test reports, galvanising thickness records and dimensional inspection documents.

Quality & Certifications

A plant in Guangdong is where Avantar makes its goods. The products are checked for size and strength before they are sent out. The range has been cleared by ISO 9001 for quality control, CE for the European market, and RoHS for safety around children and the environment. This set of papers is standard and is sent with every export shipment.

For EPC or tender-grade sales, you can ask for a video check before the shipment or an inspection by a third party. Every order comes with a RoHS test result, a CE certificate, and a certificate of origin.

Applications

These fasteners are suitable for the following photovoltaic installation types:

• Rooftop solar systems on metal-sheet roofs, including corrugated and standing-seam profiles
• Fiber-cement roof PV installations requiring dedicated fixing hardware
• Ground-mount solar structures where bolt sizing and load capacity are project-specified
• BIPV (Building-Integrated Photovoltaics) where dimensional compatibility with the facade system is required
• Solar carport systems exposed to wind uplift and long-term weather cycling

Request a Quote

Email your project needs, specs or sample requests to [email protected] and the team will get back to you with the appropriate documents or a custom price.

FAQ

Q: What screws are included in this range?

A: The range comprises self drilling screws, T bolts and entire fixing kits from M6 to M12. They are available in hot-dip galvanised carbon steel, SS304 and SS316 stainless steel. Each has its function in PV mounting. Self-drilling screws are used to attach to metal roofs. T-bolts are used to connect rail channels. Full kits are used to cover the whole base on both metal and fiber-cement roofs.

Q: Does Avantar make things or simply sell them?

A: We are a direct manufacturer, Avantar. The Guangdong facility carries out all its own stamping, forging, hot dip galvanising, finishing in stainless steel, measurement and mechanical load testing. Direct sourcing for large-scale ground mount and rooftop PV projects reduces the stages to acquire technical help faster.

Q: What do I have to pay attention to when I order PV mounting screws?

A: Make sure of five things: the fastener size (M6–M12), the product type (self-drilling screw, T-bolt, or complete kit), the surface finish and material grade (HDG, SS304, or SS316), the roof substrate (metal or fiber-cement), and that the product will work with your rail profile. If you are working near the seaside, you should choose SS316 instead of SS304 as it is more resistant to chloride.

Q: What kinds of certifications come with every order?

A: All of our batches are manufactured in accordance with ISO 9001, CE and RoHS. With every shipment you will receive a certificate of origin, CE certificate and RoHS test result. There are also material test reports, galvanising thickness records and dimensional inspection documents which can be used for EPC tender orders. Third party inspection and video checks before shipment are possible upon request.

Q: What do you need to order, what is the lead time, and what is the packaging?

A: Usually, the MOQ for each item is 1000 units. Lead time of Catalogue goods is 7 to 15 working days following order confirmation. The goods are packed in export quality carton or in plastic packaging. Depending on your timetable and the destination of the merchandise, you can pick between sea or air freight.

Q: Can I order a size or finish that is not conventional to the range?

A: Yeah. You can set your own thickness, length, thread form and finish. Send us your plans, the roofing material, the rail specs and where the project is located. Our engineers will analyse your needs and will quote you a pricing that will meet them exactly. Also available are project customised labels and OEM packaging.

Contact Us

For product inquiries, technical questions, or order support for Solar Panel Mounting Fasteners, reach us at [email protected]. We work with EPC contractors, system integrators, and distributors across 58+ countries.