Hex Washer Head Self-Drilling Roofing Screws
with EPDM Bonded Washers
1. Product Overview
These Hex Washer Head Self-Drilling Roofing Screws are engineered for reliable, long-lasting fastening in metal roofing, steel structures, and outdoor construction projects. Featuring a carbon steel body, zinc-plated finish, and pre-bonded EPDM washer, they deliver exceptional corrosion resistance, weatherproofing, and structural stability. The self-drilling tip eliminates pre-drilling, enabling fast, efficient installation in thin to medium-gauge steel sheets.
Designed to withstand harsh outdoor environments, these screws are ideal for both DIY and professional applications, from simple metal-to-metal connections to heavy-duty structural assemblies.
2. Key Features & Benefits
Hex Washer Head Design
The hexagonal head fits standard socket tools for high-torque, slip-free installation. The integrated flange washer distributes pressure evenly, preventing sheet metal damage and ensuring a secure hold.
Carbon Steel Construction
High-grade carbon steel offers robust tensile strength and durability, withstanding wind loads, shear forces, and long-term exposure to outdoor conditions.
Pre-Bonded EPDM Washer
Factory-bonded EPDM rubber washer creates a permanent, weather‑tight seal. It prevents water penetration, stops corrosion at the fastener point, and protects against leaks in metal roofing applications.
Galvanized Zinc Finish
Zinc plating provides reliable rust and corrosion protection, extending service life in humid, coastal, or high‑moisture environments.
High-Quality Self-Drilling Tip
Precision-engineered drill point cuts through steel cleanly without pre‑drilling, reducing labor time and eliminating sheet splitting.
Standard Thread Design
Uniform standard threads ensure strong, consistent engagement with steel substrates, delivering excellent pull-out resistance and vibration stability.
3. Technical Specifications
| Parameter | Details |
|---|---|
| Measurement System | Metric |
| Material | Carbon Steel |
| Finish / Coating | Zinc Plated (Galvanized) |
| Thread Type | Standard Thread |
| Head Style Options | Hex, Flat, Cheese |
| Cap Diameter | 10 mm (standard) |
| Grade | DIY / Industrial Grade |
| Customization | Drawing-based customization, full OEM service available |
| Sample Availability | 20 pcs samples provided |
| MOQ | 5,000 pieces |
| Payment Term | FOB |
| Lead Time | 10–25 days |
| Packaging | Small Box + Outer Carton + Pallets (export standard) |
| Single Package Size | 10.5 x 10 x 6.5 cm |
Size & Length Options
Metric lengths
- 10 mm – Thin-gauge steel
- 12 mm – Light metal roofing
- 13 mm – Standard metal-to-metal
- 16 mm – Medium-gauge steel
- 25 mm – Thicker metal/wood assemblies
- Custom lengths available
Thread size options
- M3.5 / M4.2 / M4.8 / M5.5 / M6.3
- #6 / #8 / #10 / #12 / #14 (US sizes)
- Application: Light sheet metal → heavy-duty steel connections
Drill point selection
- #1 – Max ~1 mm steel (ultra‑thin metal)
- #2 – Max ~3 mm steel (standard metal roofing)
- #3 – Max ~6 mm steel (medium gauge)
- #5 – Max ~12 mm steel (thick steel/composite)
4. Applications
The EPDM washer makes these screws especially suitable for outdoor, weather‑exposed applications where water tightness is critical.
5. Quality & Manufacturing
Hex Washer Head Self‑Drilling Roofing Screws | Carbon Steel + EPDM Bonded Washer | Metric & US sizes | Custom MOQ 5,000 pcs
Direct Contact Channels
- One-stop service: design, customization, production, and global delivery
- OEM/ODM solutions for industrial and export-oriented buyers
