2025.12.21 Precision Engineering for Steel-to-Timber Connections

What Is a Wing Tip Self-Drilling Screw?

Wing Tip Self-Drilling screws featuretwo precision-formed wings positioned above the drill point. During installation, these wings ream and enlarge the hole in the steel, allowing the screw shank to pass freely. When the screw reaches the timber substrate, the wings shear off automatically, enabling the thread to engage firmly into the wood.

This intelligent design eliminates pre-drilling and prevents thread damage—ensuring secure, repeatable performance on site.

Key Functional Features

• Winged Reaming Design
  Prevents thread engagement in steel, avoiding jacking and incomplete seating.

• Hardened Drill Point
  Capable of penetrating steel sheets efficiently before transitioning into timber.

• Optimized Thread Geometry
  Ensures strong pull-out resistance and stable load transfer in wood.

• Controlled Wing Break-Off
  Consistent wing release guarantees clean fastening every time.

Common Specifications

• Diameters: Commonly Ø4.8 mm – Ø6.3 mm

• Lengths: From 25 mm up to 150 mm (custom lengths available)

• Materials:

  • Carbon Steel (C1022)

  • Stainless Steel (optional for specific environments)

• Surface Treatments:

  • Zinc Plated

  • Ruspert® / Ceramic Coating

  • Mechanical Galvanizing

  • Customized coatings per corrosion class requirements

Application Scenarios

Wing Tip Self-Drilling Screws are widely used in:

• Steel roofing sheets fixed to timber purlins

• Timber framing with steel brackets or connectors

• Lightweight steel-to-wood construction systems

• Modular buildings and prefabricated structures

These screws are particularly popular in roofing and façade systems, where speed, accuracy, and long-term holding strength are critical.

Advantages Compared to Conventional Screws

Corrosion Protection & Service Life

With advanced coatings such as Ruspert®, DD Fasteners’ Wing Tip Self-Drilling Screws offer extended corrosion resistance, suitable for exterior and semi-exposed environments. Depending on coating selection, products can meet regional standards such as AS3566, ensuring reliable service life in demanding climates.

OEM & Custom Engineering Support

DD Fasteners provides OEM-focused solutions, including:

• Customized wing geometry

• Alternative head styles and drive systems

• Material upgrades (C1022A, SUS304/316, Bi-metal)

• Project-specific coating systems

From concept to delivery, we support fastening solutions tailored to your structural and environmental requirements.

Your Trusted Partner in Fastening Solutions

By combining application-driven design, consistent quality, and global market expertise, DD Fasteners delivers Wing Tip Self-Drilling Screws that professionals trust for performance, safety, and durability.

📌 Learn more at: www.ddfasteners.com
📱 WhatsApp: +852 68409292
📧 Email: felixyung@ddfasteners.com

DD Fasteners — Engineered to Connect. Built to Last.