Solar PV Fasteners Series
Solar Mounting Fastener Solutions
Engineered for durability | Corrosion resistant | Global standards compliant
PV Fastener Series
Solar Mounting Fastener Solutions
Engineered for durability | Corrosion resistant | Global standards compliant
1. Product Overview
Our PV fastener series are specifically designed for solar mounting structures, providing reliable connection solutions for utility-scale, commercial, and residential photovoltaic installations. With excellent corrosion resistance and high mechanical strength, they ensure long‑term stability in harsh outdoor environments (C5‐M / CX environments).
2. Bolt Types & Specifications
| Type | Typical Size Range | Material & Finish | Key Features |
|---|---|---|---|
| Hexagon Head Bolt | M8×25 – M12×120 | Carbon Steel / Stainless A2-70 / A4-80 HDG / Dacromet |
High torque resistance, ideal for main rail & pile connections |
| Carriage Bolt | M8×30 – M10×80 | Stainless A2-70 / HDG | Square neck prevents rotation, suitable for timber or aluminum structures |
| T‑Bolt (T‑slot) | M6×20 – M10×50 | Stainless A2-70 / Electro‑galvanized | Quick assembly with aluminum rails, adjustable positioning |
| Flange Bolt | M8×30 – M12×100 | Stainless A2-70 / HDG | Integrated washer distributes load, reduces part count |
| Eye Bolt | M8×30 – M12×80 | Carbon Steel HDG | For hoisting or tension wire anchoring |
| Grounding Bolt | M8×20 – M10×40 | Stainless A2-70 + tin‑plated copper tip | Ensures electrical continuity, anti‑corrosion design |
3. Application Scenarios
| Application Area | Recommended Fasteners | Key Requirements |
|---|---|---|
| Ground Mount System | Hex Head Bolt, Carriage Bolt, T-Bolt | High salt spray resistance, high shear strength |
| Roof Mount (Metal / Tile) | Flange Bolt, T-Bolt, Stainless A4 | Lightweight, corrosion resistance, waterproof sealing |
| Carport / BIPV | Stainless Steel A4 Bolts, Grounding Bolt | Aesthetic appearance, long‑term outdoor durability |
| Tracking System | Flange Bolt, High‑Strength Hex Bolt (10.9) | Fatigue resistance, anti‑loosening performance |
| Module Clamping | T-Bolt, Carriage Bolt | Quick installation, adjustable clamping force |
4. Performance Standards & Compliance
ISO 898-1 / ASTM A325ISO 3506-1 (A2-70 / A4-80)
ISO 1461 / ASTM A153ISO 9227 Salt Spray
IEC 62548 / UL 2703DIN / IFI / ASME
ISO 1461 / ASTM A153ISO 9227 Salt Spray
IEC 62548 / UL 2703DIN / IFI / ASME
- Mechanical properties: Grade 8.8 / 10.9 for carbon steel; A2-70 / A4-80 for stainless.
- Corrosion protection: Hot‑dip galvanizing (min 55µm), Dacromet, or Geomet coating up to 1000h NSS.
- Structural & grounding compliance: Tested per IEC 62548 and UL 2703 for PV mounting systems.
5. Technical Data (Sample Selection)
| Bolt Type | Grade | Thread | Tensile Strength (MPa) | Salt Spray Resistance | Typical Torque (Nm) |
|---|---|---|---|---|---|
| Hex Bolt | 8.8 | M10×50 | ≥800 | HDG: 1000h | 40–50 |
| Carriage Bolt | A2-70 | M8×40 | ≥700 | 500h (SST) | 20–25 |
| T-Bolt | A2-70 | M8×35 | ≥700 | 500h (SST) | 25–30 |
| Flange Bolt | 10.9 | M12×70 | ≥1040 | Dacromet: 720h | 80–100 |
| Grounding Bolt | A2-70 | M8×25 | ≥700 | Special coating ≥600h | 15–20 |
*Torque values are indicative, actual values depend on joint conditions and lubrication.
6. Packaging & Delivery
- Standard packaging: Bulk carton + pallet (max 1200 kg/pallet), or small plastic boxes with custom labels.
- Labeling: Product type, size, quantity, batch number, certification mark, and material traceability code.
- Lead time: 15–30 days based on quantity, surface treatment, and stainless/carbon selection.
- Anti-rust protection: VCI paper + sealed inner bags for high‑grade stainless steel items.
7. Quality Assurance
- ✔ 100% dimensional inspection (optical sorting available).
- ✔ Torque test / tensile test per batch (ISO 898‑1 / ISO 3506‑1).
- ✔ Salt spray test report available upon request (ISO 9227).
- ✔ RoHS, REACH compliant for all coatings and stainless steel materials.
- ✔ Full traceability from raw material to finished goods.
