Release time：2020-01-16 18:44 Browse：
1. **Design and Structure** - **Hexagon Head**: The hexagonal shape of the head provides a larger contact area for wrenches, enabling higher torque transmission. This ensures that the screws can be tightened firmly without slipping, which is crucial for securing metal plates on roofs. - **Twist Self - Drilling Tip**: The unique twist - type self - drilling tip is designed with sharp cutting edges and a spiral flute. This design allows the screw to quickly and smoothly penetrate metal plates, eliminating the need for pre - drilling holes. The spiral flute also helps to remove metal shavings during the drilling process, preventing clogging. - **Slotted Drive**: The slotted drive system is a simple and traditional design. It allows for easy operation with standard slotted screwdrivers, making it accessible for both professional installers and DIY enthusiasts. The slot is precisely cut to ensure a proper fit with the screwdriver, reducing the risk of cam - out (screwdriver slipping out of the slot) during installation. - **Thread Design**: The screws feature a specific thread pattern optimized for metal - to - metal fastening. The threads are cut deep enough to provide a strong grip in the metal plate, while the pitch is carefully calculated to balance ease of insertion and holding power. This ensures that the screws remain securely in place even under vibration and changing weather conditions. 2. **Material Properties** - **Screw Body**: Typically made from high - grade carbon steel or stainless steel. Carbon steel offers high strength and durability, making it suitable for most general - purpose metal roofing applications. Stainless steel, on the other hand, provides excellent corrosion resistance, making it ideal for use in coastal areas or environments with high humidity and exposure to chemicals, ensuring the longevity of the roofing system. - **EPDM Rubber Washer**: EPDM (Ethylene - Propylene - Diene Monomer) rubber is known for its outstanding resistance to UV radiation, ozone, and extreme temperatures. It can maintain its elasticity and sealing properties over a wide temperature range, from - 50°C to 150°C. This ensures that the washer effectively seals the hole created by the screw, preventing water ingress, which is essential for maintaining the integrity of the roof. 3. **Installation and Usage** - **Ease of Installation**: Due to their self - drilling and slotted drive features, these screws can be installed quickly and efficiently. Installers can simply position the screw on the metal plate and use a slotted screwdriver or a power - driven screwdriver with a slotted bit to drive the screw in. This reduces installation time compared to traditional screws that require pre - drilling. - **Versatility**: Suitable for a variety of metal roofing materials, including galvanized steel, aluminum, and corrugated metal sheets. They can be used in both residential and commercial roofing projects, providing a reliable fastening solution for different types of metal plate thicknesses. - **Safety and Stability**: The combination of the hexagon head, self - drilling tip, and thread design ensures that the metal plates are securely fastened to the roof structure. This not only provides stability to the roof but also enhances the overall safety of the building by preventing the metal plates from detaching during high winds or other adverse weather conditions. 4. **Performance and Maintenance** - **Sealing Performance**: The EPDM rubber washer creates a tight seal around the screw, effectively preventing water from seeping through the holes in the metal plate. This helps to protect the underlying roof structure from water damage, such as rust and rot, and extends the lifespan of the roof. - **Resistance to Wear and Tear**: The high - quality materials used in the screws and the washer make them resistant to wear and tear. The screw's surface treatment, such as zinc plating or powder coating, further enhances its resistance to corrosion and abrasion. This means that the screws will continue to perform well over time, even in harsh outdoor environments. - **Low Maintenance**: Once installed, these screws require minimal maintenance. The EPDM rubber washer does not degrade easily and maintains its sealing properties for a long time. The self - drilling design also reduces the risk of damage to the metal plate during installation, minimizing the need for repairs or replacements due to improper installation. 5. **Industry Standards and Certification** - **Compliance**: These screws are often manufactured in compliance with international and national standards for roofing fasteners. For example, they may meet standards related to tensile strength, corrosion resistance, and thread quality. This ensures that the screws are of consistent quality and can be trusted for use in various construction projects. - **Certification**: Many manufacturers obtain certifications such as ISO 9001 for quality management systems. Some screws may also be certified for specific applications, like fire resistance or wind uplift resistance, depending on the requirements of the roofing project. These certifications provide assurance to contractors and building owners about the reliability and performance of the screws.
