2025.07.13 High-Grade AS3566 Class 4 Self Drilling Screws

Product Overview
Product Name: Self Drilling screws – AS3566 Class 4

Standard Compliance: AS3566.2 (Class 4), ISO 15480, DIN7504

Material: Hardened Carbon Steel (C1022A), optional Bi-metal or SUS304/SUS316 for enhanced corrosion protection

Surface Coating: Ruspert Coating (500–1000+ hrs salt spray resistance), Zinc-Nickel Alloy, Dacromet, Mechanical Galvanizing

Available Head Types: Hex Washer Head, Hex Flange Head, Pan Head, Truss Head, Wafer Head

Drill Point Options: #2 to #5 drill points, designed for penetration into 3.0mm–12.5mm steel substrates

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

Length Range: 16mm – 150mm

Washer Assembly: Assembled with bonded sealing washers (EPDM, Neoprene) upon request

Color Finish Options: Natural silver, grey, black, or customized head paint for aesthetic blending

Key Features & Technical Advantages
High Corrosion Resistance: Certified AS3566 Class 4 protection ensures long-term durability in marine, coastal, and high-humidity regions

Self-Drilling Capability: Precision drill tip eliminates pre-drilling, ensuring fast, efficient penetration into steel, timber, or composite sheeting

Superior Coating Technology: Ruspert triple-layer ceramic coating provides exceptional barrier against rust, salt, and chemical exposure

High Torque and Tensile Strength: Manufactured with controlled heat treatment for optimal shear and pull-out resistance

Leakproof Assembly: Available with EPDM bonded washers for superior sealing in roofing and cladding applications

Optimized Thread Design: Deep thread profile for strong grip in metal-to-metal or metal-to-wood applications

Color Matching: Painted screw heads available to match roof or panel colors for a seamless visual finish

Application Scenarios
DD Fasteners’ AS3566 Class 4 Self Drilling Screws are extensively used in:

Roofing Construction – Securing metal roof sheets to steel purlins or timber frames

Facade Cladding – Ideal for steel framing and insulated panel installations

Solar Panel Mounting – Durable under UV and salt-laden air exposure

Coastal Infrastructure – Withstanding salt spray and wind-driven moisture

Industrial Sheds & Warehousing – Ensuring structural integrity in high humidity zones

Compared to traditional C1022 screws with electroplated zinc coatings, Class 4 screws offer exponentially greater life expectancy, particularly in outdoor, marine, and industrial settings where AS3566 compliance is mandated by local building codes.

OEM Customization Available
DD Fasteners supports full OEM & ODM solutions to meet your specific project requirements. Clients can specify:

Custom screw head designs

Drive types (Phillips, Hex, Square)

Special coatings

Non-standard lengths or diameters

Washer material and dimensions

Packaging options (bulk, color box, blister packs)

A Trusted Fastener Partner for Global Projects
With over 22 years of manufacturing experience and exports to more than 120 countries, DD Fasteners is recognized for delivering consistent quality, competitive lead times, and expert technical support. The AS3566 Class 4 Self Drilling Screw Series further cements its role as a key supplier to the roofing, façade, and construction industries globally.

🔹 Interested in a Quotation or Sample?
Visit: www.ddfasteners.com
Email: felixyung@ddfasteners.com
WhatsApp: +852 68409292

DD Fasteners — Fastening the Future with Confidence.