Hex Head Composite Self Drilling Bi-Metal Screws are advanced fasteners designed for superior performance in demanding applications, particularly for attaching to structural steel without pre-drilling. These screws feature a unique bi-metal construction, typically combining a hardened carbon steel drill tip with a corrosion-resistant stainless steel body, ensuring both efficient drilling and long-term durability. The hex head allows for easy and secure driving with standard hex drivers.

Definition

A Hex Head Composite Self Drilling Bi-Metal Screw is a specialized fastener characterized by its two-part construction: a hardened carbon steel drill point and lead threads, fusion-welded to a corrosion-resistant stainless steel shank and hex head. This design enables the screw to drill its own pilot hole through structural steel and then create a secure, durable, and weather-resistant connection in a single operation, eliminating the need for pre-drilling and separate sealing washers in many applications.

Advantages

• Self-Drilling Capability: The hardened drill point can penetrate thick structural steel without the need for pre-drilling, saving significant time and labor.
• Bi-Metal Construction: Combines the strength and drilling efficiency of carbon steel with the corrosion resistance of stainless steel, offering the best of both worlds.
• Corrosion Resistance: The stainless steel body provides excellent resistance to rust and oxidation, making it ideal for outdoor and corrosive environments.
• High Shear Strength: Designed to offer robust connections with high shear and tensile strength, ensuring long-term stability.
• Hex Head Design: The hex head allows for strong torque application and provides a secure, cam-out resistant drive with a hex driver.
• Reduced Installation Time: Eliminates the need for multiple steps (drilling, then fastening), streamlining installation and increasing efficiency.

Applications

• Metal Building Construction: Widely used for fastening metal roofing, siding panels, and structural components to steel purlins and girts.
• Solar Panel Installations: Ideal for securing solar racking systems and panels to steel support structures on rooftops and ground mounts.
• HVAC and Ductwork: Used for attaching heavy-duty HVAC components and ductwork to steel beams and frames.
• General Fabrication: Employed in various metal fabrication projects where strong, corrosion-resistant connections to steel are required.
• Cladding and Façade Systems: Suitable for installing exterior cladding, rainscreen systems, and other façade elements to steel substructures.
• Trailer and Vehicle Manufacturing: Used in the assembly of trailers, truck bodies, and other vehicles requiring resilient fasteners in steel.