Acorn SW-MW15W250 Metal to Wood Screw White 250 Count

Product Description

The ACORN SW-MW15W250 is a self-piercing, sealing tapping screw designed for metal-to-wood fastening in roofing and siding applications. Manufactured from heat-treated C1022 steel with case hardening, each screw features a 1/4-inch across-flat high-hat hex washer head with an assembled EPDM (Ethylene Propylene Diene Monomer) washer that conforms to the substrate surface for a secure, lasting seal. The twin-lead Type 17 point and hi-lo thread profile deliver faster drive times and higher pull-out resistance compared to standard thread designs. All screws carry a dacro base coating rated for 1,000-hour salt spray resistance, with white powder coat applied over the dacro layer.

These screws are suited for residential and light commercial roofing and siding installations where a weather-resistant, self-sealing metal-to-wood connection is required. The EPDM washer compresses against the panel or sheet material on installation, creating a seal that resists moisture intrusion at the fastener point. The hi-lo thread geometry reduces driving torque, making these screws practical for production installations where speed and consistency matter. Each pack contains 250 screws sold as a single unit.

Key Features

• Self-piercing Type 17 point drives without a pilot hole in sheet metal-to-wood applications
• Hi-lo thread profile increases pull-out resistance and reduces drive torque
• Assembled EPDM washer seals the fastener penetration point against moisture
• 1/4-inch across-flat hex washer head for standard hex driver bits
• 1,000-hour salt spray rated dacro base coating for corrosion resistance
• White powder coat finish over dacro base for color-matched panel installations
• 250 screws per pack

Compatibility

Designed for metal-to-wood fastening in roofing and siding applications where a self-sealing, self-piercing screw with an EPDM washer is specified.

Installation Notes

Installation is typically performed by roofing or siding contractors using a hex-head screw gun or drill driver fitted with a 1/4-inch hex bit and adjustable depth-sensitive nosepiece. Drive to the point where the EPDM washer is compressed flush against the panel surface without over-driving, which can compromise the seal. Follow applicable building codes and manufacturer panel guidelines for fastener spacing and edge distances. Do not mix fastener types within a single panel run where uniform corrosion resistance is required.

Technical Specifications

• Material: Heat-treated C1022 steel, case hardened
• Length: 1-1/2 inches
• Head Style: High-hat hex washer head
• Head Size: 1/4 inch across flat
• Washer: Assembled EPDM
• Thread Type: Twin-lead hi-lo
• Point Type: Type 17 self-piercing
• Coating: Dacro base with white powder coat topcoat
• Corrosion Rating: 1,000-hour salt spray tested
• Quantity: 250 pieces per pack
• Weight: 2.56 pounds
• UPC: 00810468002849

Standard Information

• Brand: ACORN
• Manufacturer Part Number: SW-MW15W250