Hex Flange Self-Drilling Screws with EPDM Washer | Roofing Tek - HighFasteners
Product Overview
The Hex Flange Self-Drilling Screw features a hexagonal head with integrated composite washer (metal base + EPDM rubber) for waterproof sealing. The sharp self-drilling tip eliminates pre-drilling, while the flange distributes force evenly.
Made from zinc-plated carbon steel or stainless steel, it's perfect for roofing panels, steel structures, solar mounts, and outdoor assemblies requiring corrosion resistance and reliable sealing.
Key Features:
Waterproof Sealing: EPDM rubber washer provides excellent weatherproofing and anti-vibration performance.
Self-Drilling Efficiency: Sharp tip drills and fastens in one step for quick installation.
Secure Grip: Hexagonal flange head ensures stable wrench tightening and anti-slip hold.
Technical Specifications:
| Property | Specification |
| Product Name | Hex Flange Self-Drilling Screw with EPDM Washer |
| Head Type | Hexagonal Flange |
| Washer | Composite (Metal + EPDM Rubber) |
| Material | Carbon Steel / Stainless Steel |
| Finish | Zinc Plated / Galvanized |
| Grade | Class 4 (Custom higher grades) |
| Application | Roofing, Steel Structures, Solar Panels, Outdoor Assemblies |
| Custom Support | OEM Available |
Ready to Order?
Factory Direct Price | Fast Delivery | OEM Service
Email: admin@changhua-electrical.com | WhatsApp: +86 181 3296 8158
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Detailed Product Gallery
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Technical Drawings & Specifications
Manufacturing & Quality Control
 Advanced Cold Heading Precision manufacturing. |  Optical Sorting 0-PPM defects. |  Lab Testing Tensile & Salt Spray. |
Project References
 Metal Roofing Waterproof Sealing |  Solar Mounts Secure Fastening |  Steel Structures Quick Installation |
Frequently Asked Questions
Q: Can I get free samples?
Yes! We provide free samples for standard self-drilling screws. You only need to cover the shipping cost.
Q: What washer and finishes do you support?
EPDM composite washer standard, zinc plated. Custom options available.
Q: What certifications do you have?
We are ISO9001:2015 Certified. Every shipment comes with a Factory Quality Inspection Report.
Q: What is your delivery time?
Stock items: 3-7 days. Mass production: 20-30 days.
Q: Can you produce according to drawings?
Yes, OEM/ODM is our strength. Send us CAD drawings for a quote within 24 hours.
Q: What are your payment terms?
We generally accept T/T (30% deposit, 70% before shipment). For long-term partners, we can discuss L/C.
Interested in this product?
Get in touch for more information, pricing, or custom requirements.