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The Hex Flange Self-Drilling Screw with double threads and a groove is designed for connecting metal and other composite materials (such as aluminum composite panels, etc.). This screw features a double-thread design and a groove structure, allowing it to easily penetrate metal sheets and fix aluminum composite materials (ACM) without the need for pre-drilled holes. It comes with a specially designed aluminum composite gasket that provides additional sealing and stability, making it ideal for use in various construction and industrial structures, particularly in roofing, walling, and composite material applications.
The screw not only offers excellent drilling performance but also enhances the strength of the connection, reducing installation time. It is widely used in the construction industry, automotive, transportation, and other industrial sectors.
Main Features:
- Double-thread design: Increases the grip and significantly enhances connection strength.
- Groove structure: Ensures smoother penetration through materials, reducing friction and heat generation.
- Aluminum composite gasket: Provides sealing during installation, preventing water, air, or dust from entering the connection.
- Self-drilling function: No need for pre-drilled holes, offering quicker and more convenient installation.
- Corrosion resistance: Ideal for outdoor and humid environments.
| Mechanical Properties | |
| Tensile Strength: | Approximately 800-1200 MPa, suitable for common industrial loads. |
| Shear Strength: | Approximately 600-1000 MPa, providing strong shear resistance during metal connections. |
| Compression Strength: | Typically between 700-1200 MPa, depending on the strength of the connected materials. |
| Core Hardness | |
| Core Hardness: | Typically made of carbon steel (such as 1022A) or alloy steel (such as 45# steel). The core hardness is usually between HRC 30-45, ensuring both durability and resistance to stretching without compromising the screw's strength. |
| Carbon steel (1022A) | Hardness HRC 30-35 |
| Alloy steel (45# steel): | Hardness HRC 40-45 |
| Surface Hardness: | |
| Surface Hardness: | After heat treatment or galvanization, the surface hardness typically ranges from HRC 45-55, significantly enhancing corrosion resistance and wear resistance. |
| Surface treatment: | Zinc plating, black oxide, hot-dip galvanizing, etc., to improve corrosion resistance. |
| Corrosion Resistance: | The screws can pass salt spray tests for 200-500 hours, making them suitable for outdoor environments and humid climates. |
Product Applications:
This sandwich self-drilling screw is widely used in the following areas:
Construction Industry:
- Used for fixing metal and composite materials, especially for installation in aluminum composite panels (ACM), color steel panels, sandwich panels, and other building materials.
- Metal and insulation material connections: For example, connecting metal sheets (such as steel, aluminum) with insulation materials (such as mineral wool, polyurethane) in exterior walls or roofing structures.
Automotive Manufacturing:
- Used for fixing outer shells, door frames, and body parts in automotive manufacturing, especially in areas requiring sealing and waterproofing.
Transportation:
- Used in the manufacturing and maintenance of public transportation vehicles (such as trains, buses) for connecting metal structures and composite materials.
Industrial Equipment:
- Used in the fixation of mechanical and electrical equipment, especially in applications that require strong and durable connections in industrial settings.
Assembly and Maintenance:
- Commonly used for quick assembly and repairs as the screw doesn't require pre-drilling, improving work efficiency and reducing material waste.
