White blue zinc self drilling hex head roofing screw with reduced tail single rubber seal washer

Product Description: Trapezoidal Sheet Metal Screw with EPDM Washer

Our Trapezoidal Sheet Metal Screws are precision-engineered fasteners designed for secure and weatherproof installations in construction and roofing applications. Crafted from high-strength galvanized steel and equipped with a 14 mm/16mm EPDM sealing washer, these screws deliver exceptional corrosion resistance and waterproofing performance, making them ideal for exposed outdoor environments.

Key Features & Benefits

Superior Weather Resistance

Galvanized Steel Construction: Zinc coating provides robust protection against rust and corrosion, extending the screw’s lifespan even in harsh climates.

EPDM Sealing Washer (14 mm/16mm): Creates a permanent, watertight seal that prevents moisture ingress, ensuring long-term protection for roofs and walls. The EPDM material remains flexible across temperatures from -40°C to +120°C, maintaining sealing integrity under thermal expansion.

Self-Drilling Tip

No Pre-Drilling Required: The sharp, self-drilling tip penetrates trapezoidal sheets, sandwich panels, and wooden substructures effortlessly, reducing installation time and labor costs.

Hexagon Socket Drive 

Secure Installation: The internal hex drive (compatible with 8 mm socket wrenches) prevents slippage during tightening and allows for high-torque application, ensuring consistent clamping force.

Recommended Tools: Use with electric screwdrivers or impact drivers fitted with hexagonal bits for efficient installation.

Application Versatility

Ideal for:

Securing trapezoidal metal sheets to steel or wooden substructures.

Installing sandwich panels in industrial roofing and wall systems.

Weatherproofing roofs, valleys, and curtain walls.

Not Recommended for Aluminum Sheets: Due to potential galvanic corrosion between zinc and aluminum, we advise using stainless steel screws for aluminum substrates.

Technical Specifications

Why Choose This Screw?

Leak-Proof Guarantee: The EPDM washer compresses evenly under pressure, forming a seal that resets after thermal movement.

Structural Integrity: Maintains clamp force under vibration and wind loads, preventing loosening over time.

Cost-Efficient: Eliminates pre-drilling and reduces installation time by up to 50% compared to conventional screws.

Batch Consistency: Automated manufacturing ensures uniform dimensions and coating thickness for reliable performance.

Applications

Industrial Roofing: Fastening trapezoidal sheets to purlins.

Agricultural Buildings: Securing cladding to wooden frames.

Warehouses and Logistics Centers: Assembling sandwich panels for insulation.

Curtain Wall Systems: Attaching metal panels to secondary steel work. 

Ordering Information

Samples: Available upon request for testing and validation.

Customization: Options include length variations, washer colors (RAL codes), and private packaging.

Support: Technical data sheets and installation guides provided with orders.

Contact us for pricing and lead time details tailored to your project scope!