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Metal Roof Screws & Self-Drilling Tek Screws for Global Construction
ISO 9001:2015, FM Approved, BIS Certified & AS3566 Compliant Roofing Fasteners Engineered for Heavy-Duty Performance Worldwide
When it comes to commercial, industrial, and residential steel construction, structural integrity must withstand global environmental challenges. BDN FASTENERS® is a premier global brand specializing in high-tensile carbon steel metal roof screws, offering the ultimate shear strength and pull-out resistance required for modern steel structures across North America, the Asia-Pacific, India, the Middle East, and Europe.
Driven by an uncompromising commitment to construction safety and reliability, our products and facilities carry the world’s most prestigious compliance certifications:
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ISO 9001:2015 Certified: Guaranteed excellence in our global quality management system.
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FM Approved: Verified performance for top-tier windstorm resistance, fire safety, and construction reliability.
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BIS Certified (IS 18471:2025): Fully compliant with the latest Bureau of Indian Standards regulations, making BDN the trusted choice for major industrial projects in the Indian market.
- AS3566 Standard: Verified drilling performance and corrosion resistance for roofing screws
Whether facing the high wind-uplift and hurricane forces in the US, the intense heat of the Middle East, or the demanding infrastructure requirements in India and Southeast Asia, BDN Fasteners delivers total engineering peace of mind.
ISO 9001 Certification
FM Approval Supplier
BIS Certification
AS3566 Australian Standards
BDN FASTENERS® understands that a building is only as good as the fasteners that hold it together. Our metal roof screws are the ultimate choice for light and heavy industrial applications, residential roofing, and commercial steel structures. Every single batch of our roofing screws undergoes stringent quality control and batch testing. This guarantees that from the first screw to the last, you receive nothing less than total reliability, smooth drilling performance, and long-lasting structural hold.
Advanced Surface Coating & Corrosion Warranty Guide
Not all corrosion resistance coatings are created equal. Beware of fancy terminology and over-exaggerated claims. BDN Fasteners utilizes a scientifically proven, multi-layered protective system featuring an Acid Resistant Topcoat, a Salt Resistant Base Coat, and specialized metal treatments over a premium Carbon Steel core. Look for our authentic head markings (BN3 or BN4) to ensure genuine product integrity.
To provide ultimate peace of mind for structural engineers and specifiers, we offer an official Surface Coating Corrosion Warranty specifically for our high-end Class 4 Mechanically Plated Zinc-Tin fasteners under various ISO 9223 environmental categories:
Specification Guide: Coating Grades & Corrosion Resistance
To ensure the longevity of your metal roofing system, selecting the right surface treatment for your specific geographic and atmospheric environment is crucial. BDN Fasteners provides heavy-duty carbon steel screws with advanced protective coatings tailored for distinct global climate zones.
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ENVIRONMENTAL CONDITIONS |
ATMOSPHERIC |
WARRANTY |
WARRANTY |
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🌆 Light Industrial Urban Most areas beyond 50km from the sea, but can be as close as 1 km from sheltered seas. |
C2 (Low) | 20 YEARS |
30 YEARS |
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🏭 Industrial Between 2km and 10km from an industrial plant, sewage treatment, or airport. |
C2 (Low) | 15 YEARS |
25 YEARS |
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🏡 Moderate Urban Industrial Urban and industrial areas with low pollution; varies with winds and topography. |
C3 (Medium) | 12 YEARS |
20 YEARS |
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🌊 Mild & Moderate Marine Coastal areas within 50km from the sea, sheltered with low salinity. |
C3 (Medium) | 12 YEARS |
20 YEARS |
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🏗️ Severe Industrial Within 2km of an industrial plant, aggressive industrial area, sewage treatment, or airport. |
C4 (High) | ❌ Not Recommended | 15 YEARS |
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🚢 Severe Marine Between 400m and 1km from the ocean, or within 150m from a salt water inlet/creek. |
C4 (High) | ❌ Not Recommended | 12 YEARS |
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⚓ Very Severe Marine Up to 400m from the ocean, but outside the ocean spray zone. |
C5 (Extreme) | ❌ Not Recommended | ❌ Not Recommended |
Technical Guide: How to Read Self-Tapping Screw Sizes
Most construction screw sizes combine three vital pieces of information: Diameter (Gauge), Thread Count (or Pitch), and Length.
- Imperial/Gauge Notation (e.g., 12-11 x 65mm): Read as a #12 nominal screw gauge, an 11-thread designation (threads per inch), and a 65mm overall screw length.
- Metric Notation (e.g., M6.0-1.00 x 22mm): M6.0 refers to the nominal major diameter, 1.00 is the thread pitch in millimeters, and 22mm is the overall length.
Engineering Fact: When converting to metric, an imperial #12-11 x 65mm screw can also be written as M5.5-2.3 x 65mm. Threads per mm can be calculated as $\text{TPI}/25.4$, and the pitch distance between threads is $25.4/\text{TPI}$.
METAL-Tite™ Self-Drilling Screws
High-performance self-drilling screws for metal roofing applications.
BDN Fasteners® offers a complete range of self-drilling screws (Tek screws) for metal roofing, steel-to-steel, and steel-to-timber applications. Designed for fast installation without pre-drilling, these metal roof screws deliver reliable drilling performance and strong pull-out strength.
All products comply with the AS3566 standard and are available in multiple coating options to suit different environmental conditions.
Explore the full range of METAL-Tite™ self-drilling screws below.
Selection Guide
| Product | Point | Gauge TPI x Length (mm) | Application | Max. drilling capacity (mm) | Part Number |
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Dual-Edge Drill Point |
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fixing cladding to Metal | 4.0mm thick |
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Dual-Edge Drill Point |
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fixing cladding to Metal | 6.0mm thick |
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Dual-Edge Drill Point |
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fixing roof sheeting to metal | 6.0mm thick |
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Dual-Edge Drill Point |
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Roof sheeting to metal – enhanced pull-out strength. | 6.0mm thick |
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No.5 Drill Point |
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fixing to thick steel | 12.5mm thick |
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No.5 Drill Point |
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fixing insulated panels to thick steel | 12.5mm thick |
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Reduced Point |
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for stitching metal roof sheets at side laps. | 1mm+1mm thick |
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Needle Point |
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for stitching metal roof sheets at side laps. | 1mm+1mm thick |
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Thunder-Shot Drilling Point |
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for concealed fixing steel sheets to steel substructures. | 4.0mm thick |
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Thunder-Shot Drilling Point |
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for concealed & pierce fixing snap-lock cladding panels to thin-gauge steel battens. | 2.5mm thick |
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TIMBER-Tite™ Self-Tapping Screws
Reliable self-tapping screws for metal roofing to timber applications.
BDN Fasteners® offers TIMBER-Tite™ self-tapping screws, specially designed for metal roofing to timber applications. These screws provide secure fastening for roof sheeting without pre-drilling, ensuring efficient installation and reliable performance.
Longer screws such as T17CG1265C3N and T17CG1250C3N are ideal for crest fixing, while shorter screws like T17H1020C3N are designed for valley fixing.
Explore the full range of TIMBER-Tite™ self-tapping screws below.
Selection Guide
| Product | Point | Gauge TPI x Length (mm) | Application | Timber Penetration (mm) | Part Number |
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Type 17 Sharp Point |
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fixing metal roofing into timber battens | 4.0mm thick |
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Type 17 Sharp Point |
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fixing metal roofing into timber battens | 6.0mm thick |
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Polycarbonate Roofing Fasteners
Specialized fasteners for polycarbonate roofing systems.
BDN Fasteners® offers POLYXPAND™ and POLY-FAST™ fasteners, specially designed for polycarbonate and plastic roofing panels.
These fasteners feature a cutting washer that creates the required thermal expansion hole while fastening the panel to the supporting purlin in one step, ensuring efficient installation and reliable performance.
The integrated cutting washer also works as a stopper, preventing over-driving and protecting the raised profile from damage during installation.
Explore the full range of polycarbonate roofing fasteners below.
Selection Guide
| Product | Point | Gauge TPI x Length (mm) | Application | Max. drilling capacity (mm) | Part Number |
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Thunder-Shot Point |
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fixing polycarbonate skylight to metal | 5.5mm thick |
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Thunder-Shot Point |
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fixing polycarbonate skylight to metal | 4.5mm thick |
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Type 17 Needle Point |
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fixing polycarbonate skylight to timber | Min. timber penetration: 25 mm. |
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Duofix V-Drill Point |
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Dual purpose, fixing polycarbonate skylight to metal & timber | Max. steel drilling: 3.0 mm; Min. timber penetration: 25 mm. |
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Coating Options & Corrosion Resistance
BDN Fasteners® offers a range of coating options designed to meet different corrosion resistance requirements in construction environments:
Multi-layer coating system for superior corrosion resistance. Advanced multi-layer coating system
- Salt Spray Test (SST): 1000hrs
- Kesternich Test: 7 cycles
High-performance zinc-tin coating
- Salt Spray Test (SST): 2000hrs
- Kesternich Test: 15 cycles
Standard zinc coating for basic corrosion protection
- Cost-effective solution for general use
Fastener Selection & Application Guide
| Application Field | Recommended Size Range | Preferred Point & Feature Type | Key Structural Selection Factors |
| Metal roof sheet to timber (Valley Fixing) | 10-12 x 20mm to 12-11 x 30mm | Type 17 sharp point | Ensures optimal timber penetration and compression of weatherproofing EPDM washer. |
| Metal roof sheet to timber (Crest Fixing) | 12-11 x 50mm to 12-11 x 65mm | Type 17, double thread, Scratshank | Accounts for roof profile corrugation height and extreme pull-out strength against wind uplift. |
| Cladding to light steel | 10-16 x 16mm to 10-16 x 25mm | Self-drilling or reduced point | Carefully calibrated for light-gauge steel thickness and cladding build-up. |
| Cladding to medium steel | 12-14 x 20mm to 12-14 x 35mm | Self-drilling point | Designed for precise purlin thickness penetration and reliable thread engagement. |
| Roof sheeting to structural steel | 12-14 x 45mm to 12-14 x 90mm | Self-drilling, full or double thread | Accommodates profile height, heavy industrial sheets, and thick substrate anchorage. |
| Thick heavy steel fixing | 12-24 x 32mm to 12-24 x 50mm | No.5 heavy-duty drill point | Extreme drilling capacity engineered to pierce heavy structural steel beams without pre-drilling. |
BDN Fasteners® metal roof screws, self-drilling screws, and self-tapping screws are designed for a wide range of construction applications, including:
- Metal roofing systems and roofing sheet installation
- Steel structures and structural steel framing
- Self-drilling screws for steel-to-steel applications
- Self-tapping screws for steel-to-timber applications
- Wall cladding, sandwich panels, and facade systems
- Industrial and commercial building construction projects worldwide
Global Supply, Trusted Performance
BDN Fasteners® combines manufacturing expertise, strict quality control, and global market experience to deliver reliable fastening solutions tailored to different regional requirements.
FAQ – Questions and answers
The most common questions in construction
Other Products
Colored Roofing Screw
Collated Screws
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BDN Fasteners (Broaden Worldwide Co., Ltd) is an ISO-9001 Certified Quality Supplier-Manufacturer of Australian Standard AS3566 self-drilling and self-tapping screws in various coatings for steel to steel and steel to timber applications. Our headquarters are in Taiwan and we operate sales and marketing offices in India and Thailand.
Founded in 2009.
