The Flange Hexagon Head Self-Drilling Screw, conforming to DIN 7504K, is a specialized fastener designed for high-performance applications, particularly in metal construction and fabrication. It combines the power of self-drilling with the enhanced bearing surface of a flange head and the robust drive of a hexagon (hex) head.

Key Features:

• Flange Head (Integral Washer Head):
  • The head features an integrated, non-detachable washer-like flange beneath the hexagon head.
  • This flange provides a larger bearing surface than a standard hex head, distributing the clamping force over a wider area.
  • It helps to prevent pull-through in softer materials and reduces localized stress, offering greater stability and security for the connection.
  • Eliminates the need for a separate washer, simplifying inventory and installation.
• Hexagon Head (External Hex):
  • Designed to be driven by a wrench, socket, or hex bit.
  • Offers excellent torque transmission, making it resistant to cam-out and ideal for high-torque applications, especially when power tools are used.
  • Provides a robust and secure driving mechanism, suitable for strong and reliable connections.
• Self-Drilling Point (Drill Tip):
  • Equipped with a precision drill bit-like tip that allows the screw to drill its own pilot hole, tap its own threads, and fasten in a single operation.
  • Eliminates the need for pre-drilling, significantly speeding up installation time and reducing labor costs.
  • Available with various drill point lengths to suit different material thicknesses and types, ensuring optimal drilling performance.
• DIN 7504K Standard:
  • Conforms to the German industrial standard DIN 7504K, which specifies the dimensions, mechanical properties, and performance requirements for self-drilling screws with a hexagon head and flange.
  • Ensures consistent quality, interchangeability, and reliable performance.
• Hardened Steel (Typically):
  • Usually manufactured from hardened carbon steel (often case-hardened) to provide the necessary strength and hardness for drilling through and tapping into metal.
  • May feature various protective coatings (e.g., zinc plating, mechanical galvanizing, specialized corrosion-resistant coatings) for enhanced durability and environmental resistance.

Typical Applications:

• Metal Roof and Wall Cladding: Securely fastening metal sheets to purlins or girts in roofing and siding applications.
• HVAC Ducting and Ventilation Systems: Assembling and installing sheet metal ductwork components.
• Steel Framing: Connecting metal studs and tracks in lightweight steel construction.
• Industrial Equipment Assembly: Fastening metal panels and components in machinery and equipment.
• General Metal Fabrication: A versatile fastener for a wide range of metal-to-metal connections where a strong, stable, and efficient fastening solution is required.

Advantages:

• Fast Installation: Self-drilling capability eliminates pre-drilling, saving time and labor.
• High Clamping Force & Stability: Flange head provides a large bearing surface, reducing pull-through and increasing the stability of the connection.
• Strong Drive: Hexagon head allows for high torque application with power tools, minimizing cam-out.
• Enhanced Security: The combination of self-drilling, flange, and hex head ensures a very strong and reliable connection.
• Reduced Inventory: No need for separate washers.
• Versatility: Suitable for a wide range of metal applications, often connecting steel, aluminum, or other sheet metals.