The M8X249 Self-Drilling Double Hanger Bolt is a specialized fastener designed for installing solar panel mounting systems onto wooden substructures. Its self-drilling tip eliminates the need for pre-drilling pilot holes, significantly speeding up the installation process. One end features a robust lag screw thread for secure attachment into wood, while the other end provides an M8 machine screw thread to connect solar racking components, ensuring a strong and efficient installation.

Definition

An M8X249 self-drilling double hanger bolt is a high-performance fastening solution specifically tailored for solar panel installations. It is characterized by an 8mm diameter, a total length of 249mm, and a self-drilling tip on its lag screw end, which bores its own pilot hole into wooden rafters or purlins. The opposing end features an M8 machine thread, providing a standardized interface for attaching solar panel rails and clamps, ensuring a reliable and watertight connection without compromising structural integrity.

Key Features

• M8 Diameter: Standardized 8mm diameter for compatibility with common solar mounting hardware.
• 249mm Length: Optimized length to provide sufficient embedment into timber structures and accommodate various mounting heights.
• Self-Drilling Tip: Incorporates a drilling point to penetrate wood without the need for pre-drilling, saving time and effort during installation.
• Double Threaded Design: Features a coarse lag screw thread for secure anchoring into wood and an M8 machine thread for attaching solar racking components.
• High-Strength Material: Typically made from durable, corrosion-resistant materials (e.g., stainless steel) to withstand outdoor environmental conditions.
• Enhanced Grip: The deep, aggressive lag threads ensure superior pull-out resistance in wooden substructures.

Advantages

• Rapid Installation: The self-drilling feature eliminates a step, significantly reducing installation time and labor costs for solar projects.
• Secure and Stable Mount: Provides a strong, reliable connection between the solar racking system and the wooden roof structure.
• Reduced Tooling: Less need for specialized drilling equipment, simplifying the installation toolkit.
• Corrosion Resistance: Often made from materials that offer excellent resistance to rust and weathering, ensuring long-term performance in outdoor environments.
• Versatility: Suitable for various wooden roof types and compatible with a wide range of M8-threaded solar mounting accessories.
• Minimized Risk of Error: The self-drilling capability helps ensure precise and straight installation without misaligned pilot holes.

Applications

• Residential Solar Panel Installations: Ideal for mounting solar arrays on residential roofs with wooden rafters or purlins.
• Commercial Solar Projects: Used in larger commercial solar installations where wooden roof structures are present.
• Rooftop Solar Racking Systems: Specifically designed to anchor solar racking rails and clamps securely to timber substrates.
• Agricultural Building Solar Solutions: Suitable for barns and other agricultural structures with wooden roof framing.
• Fastening Solar Components: Provides a robust anchor point for various solar components requiring an M8 threaded connection to a wooden base.