2025.05.26 Premium Bi-Metal Sandwich Panel Screws

Product Overview

• Name: Bi-metal Sandwich Panel screws

• Thread Sizes: M4.8 to M6.3 / #10 to #14 / 3/16" to 1/4"

• Length Options: 32mm to 300mm (1-1/4" to 12")

• Material Composition:

  • Drill Point & Shank: Hardened carbon steel for maximum drilling strength

  • Body & Thread: Austenitic stainless steel (SUS304/SUS316) for superior corrosion resistance

• Thread Type: Hi-Lo thread for enhanced grip in layered materials

• Point Type: Sharp or diamond point for easy penetration without pre-drilling

• Surface Treatments: Ruspert®, Zinc Plated, Zinc-Nickel, Black Zinc, Mechanical Galvanizing

• Standards: Compliant with DIN, IFI, JIS, and customizable to client specifications

• Packaging: Available in bulk, box, bag, or blister packs

Key Features & Functional Advantages

• Dual-Material Construction: Combines the strength of carbon steel with the corrosion resistance of stainless steel, ensuring optimal drilling capacity and long-term durability in exterior and corrosive environments.

• Weather-Sealed Performance: Integrated big flange washer with EPDM sealing prevents water ingress and corrosion, essential for outdoor and moisture-prone applications.

• Self-Drilling Capability: Eliminates the need for pilot holes, reducing installation time and labor costs.

• Custom OEM Options: Configurable in drive type, dimensions, diameter, coating, and material to suit varied engineering and architectural specifications.

Application Scenarios

Roofing Construction

In roofing systems using sandwich panels, DD Fasteners’ Bi-metal Screws provide secure, long-term attachment to substructures made of steel, timber, or concrete. Their high corrosion resistance makes them ideal for use in exposed or coastal areas, ensuring a watertight seal and mechanical integrity over decades.

Cladding

For external façades and wall cladding panels, these screws offer aesthetic adaptability with color-coated heads and superior holding power even in layered substrates. Their bi-metal composition helps mitigate galvanic corrosion risks when fastening dissimilar materials.

Window Construction

In window framing and installation where thermal insulation and airtightness are critical, the Bi-metal Sandwich Panel Screws deliver precision fastening without compromising the insulation barrier, providing secure mounts for frame-to-wall transitions and panel joints.

Your Trusted Fastener Manufacturing Partner

Backed by decades of manufacturing expertise and global export experience to over 120 countries, DD Fasteners supports OEM customization for large-scale infrastructure, industrial, and residential projects. Whether your requirements demand standard compliance or bespoke engineering, DD Fasteners is your reliable solution provider.

For product inquiries, pricing, or technical consultations, please visit
🌐 www.ddfasteners.com
📧 felixyung@ddfasteners.com
📱 WhatsApp: +852 68409292

DD Fasteners – Precision, Performance, Partnership.