2025.08.13 DD Fasteners – Bi-Metal Screws

Product Overview

• Material:

  • Tip:Hardened Carbon steel for superior drilling speed and penetration

  • Shank & Head: Stainless Steel A2 (304) or A4 (316) for ultimate corrosion resistance

• Diameter Range: 4.8 mm – 6.3 mm (#10 – #14)

• Length Range: 19 mm – 150 mm (¾” – 6”)

• Head Types: Hex Washer, Countersunk, Pan, or Customized OEM Designs

• Drive Options: Phillips, Torx, Square, Hex

• Surface Treatments: Polished stainless finish, Ruspert® coating (optional)

• Standards: DIN, IFI, JIS, or per customer specifications

Key Features

✅ Drill Without Limits – The carbon steel drill point cuts cleanly through steel, aluminum, and composite materials without pre-drilling, saving time and labor costs.

✅ Corrosion-Proof Confidence – Stainless steel shank and head ensure long-term performance in coastal, industrial, and high-humidity environments.

✅ High Pull-Out Strength – Precision threads and engineered cutting geometry deliver maximum grip in metal-to-metal and metal-to-timber connections.

✅ Dual-Material Advantage – Carbon steel for speed, stainless steel for durability—offering the best of both worlds in a single screw.

✅ Versatility in Application – Suitable for thin-gauge steel roofing sheets, cladding panels, structural frames, and exterior architectural projects.

Applications

• Roofing and Cladding in Harsh Weather Zones

• Coastal and Marine Construction Projects

• Industrial Facilities & Chemical Plants

• Solar Panel Mounting Systems

• Timber-to-Metal and Metal-to-Metal Fabrications

• Public Infrastructure and Transport Shelters

From the rooftops of seaside resorts to the steel skeletons of modern industrial plants, DD Fasteners’ Bi-Metal Screws ensure performance and peace of mind—year after year.

Why Choose DD Fasteners?

With decades of manufacturing expertise, DD Fasteners delivers not just products, but engineering solutions. Our OEM customization service allows you to choose dimensions, head styles, coatings, and packaging—ensuring the perfect fit for your project or product line.

We test each screw under stringent tensile, torsional, and accelerated corrosion protocols to meet and exceed international quality standards.

📞 Partner with the Experts in Fastening Technology
🌐 Visit: www.ddfasteners.com
📧 Email: felixyung@ddfasteners.com
📱 WhatsApp: +852 68409292

DD Fasteners – Where Strength Meets Longevity.