Hex Head Self Drilling Tek Screws EPDM Washer Zinc

Professional Grade Hex Head Self Drilling Tek Screws with Bonded EPDM Washer (DIN 7504 K)

Achieve guaranteed, professional-grade fastening for all your exterior metal construction projects, including roofing, cladding, and sheet metal assembly. Our Hex Head Self Drilling Tek Screws (conforming to DIN 7504 K) eliminate the need for separate pilot holes, thereby saving significant installation time and labor costs on site. These fasteners are specifically engineered for the secure fixing of metal sheeting onto light-to-medium gauge steel purlins.

Key Features & Engineering Excellence:

• Self-Drilling Efficiency: The high-performance drill point is designed to pierce, thread, and fasten the material in a single, fast operation. They are rated for typical drilling capacity up to 5.5mm of steel substrate.

• Superior Weather Sealing: Each screw features a 16mm Bonded EPDM Washer. This component forms a durable, waterproof barrier against the elements, preventing leaks and allowing for crucial thermal movement between materials. The vulcanised bond guarantees the long-term integrity of the seal.

• Robust Construction: Manufactured from resilient Case Hardened Steel and protected by high-grade Zinc CR3 plating. The CR3 finish provides advanced, environmentally compliant corrosion resistance essential for longevity in exposed external environments.

• Certified Performance: The 5.5mm diameter delivers verified minimum mechanical performance, with a Shear Load capacity of 4.82 kN and a Tension Load capacity of 9.63 kN, ensuring a reliable, structural connection.3

• Installation: Compatible with standard 8mm Hex Nut Setters (5/16" AF) for high-torque application.

Applications: Metal Roofing, Box Profile Sheeting, Corrugated Cladding, Steel Framing, Purlin Fixing, Light-to-Medium Section Steel Structures.

Technical Specifications for 5.5mm Hex Head Self Drilling Tek Screws