1. Introduction
This manual provides essential information for the proper use and installation of TIMCO Self-Drilling Fiber Cement Board Exterior Silver Screws, size 6.3 x 130mm. These screws are designed for securing fiber cement profile sheets to timber structures, ensuring a durable and weather-resistant fastening solution.
2. Product Overview
The TIMCO Self-Drilling Fiber Cement Board Screw is engineered for specific construction applications. Key features include:
- Self-Drilling Design: Facilitates quick and efficient installation without pre-drilling in most timber applications.
- BAZ Washer: Equipped with a heavy-duty EPDM and stainless steel washer to create a watertight seal, preventing moisture ingress.
- Corrosion Resistance: Features an exterior plating that provides over 1,000 hours of salt spray resistance, suitable for outdoor use.
- Wings: Designed to ream an enlarged hole in the roofing sheet, accommodating material expansion and contraction.
- Application: Primarily used for securing Big 6 roofing sheets and other fiber cement profile sheets to timber.

Figure 1: TIMCO Self-Drilling Fiber Cement Board Screws, 6.3 x 130mm, shown in their product packaging. The packaging displays the brand, screw dimensions, and key features.
3. Safety Information
Always observe the following safety precautions when handling and installing fasteners:
- Wear appropriate personal protective equipment (PPE), including safety glasses and gloves, to prevent injury from sharp edges or flying debris.
- Ensure the work area is well-lit and free from obstructions.
- Use power tools according to their manufacturer's instructions and safety guidelines.
- Keep screws out of reach of children.
- Do not over-tighten screws, as this can damage the material or the screw itself.
4. Setup and Installation
Follow these steps for effective installation of the TIMCO Self-Drilling Fiber Cement Board Screws:
- Prepare Materials: Ensure fiber cement sheets and timber supports are clean, dry, and properly aligned for fastening.
- Select Driver Bit: Use a suitable driver bit that matches the screw head type to prevent cam-out.
- Position Screw: Place the screw, with the BAZ washer attached, through the fiber cement sheet at the desired fastening point. The washer should sit flush against the sheet.
- Drive Screw: Using a power drill, drive the screw into the timber support. The self-drilling tip will create its own pilot hole. The wings on the screw shaft will ream an oversized hole in the fiber cement sheet, allowing for thermal expansion and contraction of the sheet without stressing the fastener.
- Tighten Appropriately: Drive the screw until the BAZ washer compresses slightly, creating a watertight seal. Avoid over-tightening, which can damage the washer or the fiber cement sheet.
- Inspect: Visually inspect each installed screw to ensure the washer is properly seated and the screw is flush with the surface of the fiber cement sheet.
For optimal performance, refer to local building codes and manufacturer recommendations for fiber cement sheet installation.
5. Maintenance
TIMCO Self-Drilling Fiber Cement Board Screws are designed for long-term durability with minimal maintenance. To ensure their longevity:
- Storage: Store unused screws in their original packaging in a dry environment to protect the corrosion-resistant coating and EPDM washers.
- Inspection: Periodically inspect installed screws for any signs of damage or loosening, especially after extreme weather conditions.
- Cleaning: If necessary, clean the screw heads and washers with a soft brush and mild detergent. Avoid abrasive cleaners that could damage the coating or washer material.
6. Troubleshooting
If you encounter issues during installation or use, consider the following:
- Screw Not Driving Properly:
- Ensure the correct driver bit is used and is fully engaged with the screw head.
- Verify the timber substrate is not excessively dense or contains hidden metal.
- Check that the drill is set to the appropriate speed and torque.
- Washer Not Sealing:
- Ensure the screw is driven to the correct depth, allowing the EPDM washer to compress slightly.
- Inspect the washer for damage before installation.
- Verify the surface of the fiber cement sheet is flat and free of debris where the washer sits.
- Corrosion Appears:
- While highly corrosion-resistant, extreme environmental conditions or damage to the coating can lead to corrosion. Ensure proper installation to prevent coating damage.
- If corrosion is significant, consider replacing the affected screws.
7. Specifications
| Feature | Detail |
|---|---|
| Brand | TIMCO |
| Model Number | 731339 |
| Screw Dimensions | 6.3mm diameter x 130mm length |
| Material | Metal (with Stainless Steel exterior finish) |
| Washer Type | BAZ Washer (EPDM and Stainless Steel) |
| Corrosion Resistance | 1,000+ hours salt spray resistance |
| Color | Black (referring to the coating/washer) |
| Specific Uses | Securing fibre cement profile sheets to timber |
| Item Weight | 1.54 Kilograms (approx. 3.39 pounds) |
| Unit Count | 50 screws per package |
8. Warranty and Support
For warranty information or technical support regarding TIMCO products, please refer to the official TIMCO website or contact your authorized TIMCO distributor. Keep your purchase receipt as proof of purchase.





