High-Performance Hex Head Roofing Screws: The Ultimate Weather-Proof Fastener
At Handan Bolt, we understand that the integrity of a metal roof depends heavily on the fasteners used to secure it. Our Hex Head Self Drilling Roofing Screws are engineered to provide superior holding power, watertight sealing, and aesthetic matching for modern building projects. Located in Yongnian, the heart of China’s fastener industry, we manufacture these screws using premium C1022A hardened steel to ensure they can penetrate metal sheets effortlessly without slipping or snapping.
What makes our Roofing Screws different?
Unlike standard screws, a Self-Drilling Screw (Learn more on Wikipedia) functions as both a drill bit and a fastener. The specially designed “Tek” point eliminates the need for pre-drilling holes, significantly reducing installation time and labor costs on construction sites. Whether you are fastening metal to metal or metal to wood, our screws create their own mating threads for a secure, vibration-resistant connection.
Key Features and Specifications
1. The EPDM Washer (The Secret to Waterproofing)
Every roofing screw we produce comes paired with a high-quality EPDM (Ethylene Propylene Diene Monomer) bonding washer. Unlike cheap rubber washers that crack under UV exposure, our conductive EPDM washers are:
- Weather Resistant: Withstand extreme heat, ozone, and freezing temperatures.
- Leak-Proof: When tightened, the washer compresses to form a perfect watertight seal around the hole, preventing rain and moisture from entering the building structure.
- Long-Lasting: Designed to last as long as the roof itself, preventing rust streaks and leaks down the line.
2. Custom Color Painting (RAL Color Matching)
Aesthetically, a roof looks best when the fasteners disappear. We offer a professional Head Painting Service. We can powder coat the hex head and washer assembly to match any standard RAL color card (e.g., RAL 3005 Wine Red, RAL 6005 Moss Green, RAL 9002 Grey White). The paint is baked on to ensure it doesn’t chip during installation with a power driver.
3. Advanced Corrosion Protection
Roofing screws are exposed to the elements 24/7. To prevent rusting, we offer multiple surface treatment options:
- Blue/White Zinc Plated: Standard protection for indoor or mild environments.
- Yellow Zinc Plated: Enhanced durability.
- Ruspert / Dacromet Coating: High-grade ceramic coatings (500h+ Salt Spray Test) recommended for coastal areas or industrial environments with high pollution.
Technical Data Sheet
- Material: C1022A Hardened Carbon Steel / Stainless Steel 410 (Bi-Metal)
- Head Type: Hexagon Washer Head (8mm / 10mm / 5/16″ / 3/8″)
- Drill Point: #1, #2, #3, #4, #5 (Drilling capacity up to 12mm steel thickness)
- Diameter: 4.2mm (#8), 4.8mm (#10), 5.5mm (#12), 6.3mm (#14)
- Length: 13mm to 200mm (1/2″ to 8″)
Applications
Our self-drilling roofing screws are widely used in:
- Metal Roofing and Wall Cladding installation.
- Steel Frame Construction and Pre-engineered Buildings (PEB).
- Attaching metal sheets to steel purlins or structural beams.
- Carports, Sheds, and Agricultural Storage Buildings.
Why Choose Handan Bolt as Your Supplier?
Factory Direct Pricing: By skipping the middlemen and buying directly from our factory in Handan, you can reduce your procurement costs by 15-20%.
Rigorous Quality Control: We test drilling speed, torque strength, and salt spray resistance in our in-house lab before every shipment.
Custom Packaging: We offer small boxes (100pcs/box) with your brand logo or bulk cartons (25kg) for industrial use.
Request a Free Quote Today
Are you looking for a reliable partner for your roofing hardware needs? We can provide free samples so you can test the drilling speed and paint quality yourself.
Ready to discuss your project requirements?
Please click here to Contact Our Sales Team for a Competitive Quote. We export to Europe, South America, and Southeast Asia regularly and can handle all logistics for you.
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