Our double threaded rafter screws are engineered for secure and stable attachment of solar mounting systems to wooden rafters. With dual threads for enhanced grip and load distribution, they ensure a strong, weather-resistant connection ideal for pitched roof installations.

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End Clamp For Solar Panel Mounting

Наш double threaded rafter screws are high-performance fasteners specifically designed for mounting solar energy systems to wooden rafters in pitched roof installations. These screws play a critical role in ensuring the structural integrity, wind resistance, and long-term durability of the solar array.

With dual-thread design—one thread for wood and one for metal or mounting plate—the screws provide maximum grip and uniform load distribution between the rafter and the mounting structure. This design eliminates the need for additional anchors or chemical fixing solutions, making installation both faster and more reliable.

Key Features:

  • Dual Thread Zones: The lower thread securely grips the wooden rafter, while the upper thread locks into the mounting bracket or L-foot for strong, vibration-resistant attachment.

  • High Load Capacity: Engineered to support high mechanical loads, wind uplift, and snow pressure in both residential and commercial PV installations.

  • Material Strength: Manufactured from A2/A4 stainless steel or carbon steel with hot-dip galvanization, ensuring high corrosion resistance even in coastal or high-humidity regions.

  • Waterproofing Compatibility: Often used with EPDM sealing washers and flashing solutions to ensure a watertight roof interface.

  • Easy Installation: Compatible with standard impact drivers and torque wrenches, these screws allow fast, precise installation without pre-drilling in most applications.

  • Lengths & Sizes: Available in various lengths (e.g., 200mm, 250mm, 300mm) and thread diameters to suit different roof types and rafter depths.

These double threaded screws are widely used with:

  • L-Foot mounting systems

  • Roof hooks for tile roofs

  • Tin roof brackets or hanger bolts

  • Pitched metal sheet mounting solutions

They are essential for installations where direct anchoring into rafters is required for code compliance or structural reasons. The two-thread system ensures that the mounting rail or support bracket is firmly fixed without compressing the roof underlayment or compromising waterproofing layers.

Applications:

  • Residential rooftop solar PV systems

  • Tile and corrugated metal roofs

  • Retrofit projects with wood-frame structures

  • Installations requiring high mechanical load resistance

  • EPC and installer-grade professional mounting systems

To support international standards, our rafter screws can be supplied with certifications such as DIN EN 14592, ISO 3506, and RoHS compliance. OEM options are available for screw head design (hex, flange, or torx), laser marking, packaging, and batch customization.

By choosing our double threaded rafter screws, solar professionals ensure a safe, efficient, and compliant installation—backed by components that are engineered for strength and built to last.