2025.10.29 DD Fasteners Self-Drilling Screws for Fixing Sandwich Panels to Steel Substrates

Product Overview

Material: Carbon Steel (C1022A) / Stainless Steel (A2 / A4) / Bi-Metal options available

Diameter Range: M4.8 – M6.3 (#10 – #14)

Length Range: 32 mm – 300 mm (1¼" – 12")

Head Types: Hex Washer Head / Hex Flange Head

Thread Type: Hi-Lo Thread for better grip and reduced driving torque

Point Type: Self-Drilling Point for fast and clean penetration through steel sheets

Surface Coating: Zinc Plated, Ruspert, Zinc Nickel, or Mechanical Galvanized – up to 1000+ hours salt spray resistance

Standards: DIN / IFI / JIS or customized per client specification

Key Features & Advantages

🔹 One-Step Drilling and Fastening
The integrated drill point eliminates pre-drilling, enabling rapid installation through steel sheets and sandwich panel layers — saving time and labor on-site.

🔹 Superior Holding Power
The advanced Hi-Lo thread design ensures exceptional pull-out resistance, maintaining a firm grip between steel panels and substrates even under high wind or structural stress.

🔹 Optimized for Steel Substrates
Designed specifically for fastening to metal framing or steel sheet bases, these screws deliver reliable penetration and stable thread engagement, minimizing strip-out or deformation.

🔹 Weather-Resistant Sealing
When paired with EPDM bonded washers, DD Fasteners’ self-drilling screws provide an airtight and watertight seal — preventing corrosion, leaks, and panel damage in harsh climates.

🔹 Durability that Outlasts Traditional Screws
Compared to standard C1022 or stainless steel fasteners, DD Fasteners’ Bi-Metal and Ruspert-coated versions deliver outstanding corrosion resistance, tested up to 1000+ hours in salt spray environments.

Application Scenarios

Roof and wall sandwich panel installation on industrial or commercial buildings

Cold storage and clean room panel systems

Modular and prefabricated construction projects

Steel-framed warehouse and factory roofing systems

Whether for horizontal or vertical mounting, these self-drilling screws guarantee precise alignment and long-term stability — essential for sandwich panel assemblies.

OEM Customization Options

DD Fasteners supports full OEM & ODM services, including:

Tailor-made dimensions, drive types, and head shapes

Customized coatings and finishes for specific environments

Private labeling and export packaging solutions

Our in-house R&D and advanced coating technology ensure every screw meets international performance standards while reflecting your brand’s professional image.

Your Reliable Partner in Fastening Excellence

For over two decades, DD Fasteners has been a trusted supplier to global roofing and construction industries — combining manufacturing precision, advanced surface treatment technology, and international certification to provide dependable fastening solutions.

📞 Learn more today at www.ddfasteners.com

📱 WhatsApp: +852 68409292
📧 Email: felixyung@ddfasteners.com

DD Fasteners — Building Strength That Lasts.