Acorn SW-MW15FG250 Metal to Wood Screw 1-1/2 in Green 250 Ct

Product Description

The ACORN SW-MW15FG250 is a self-piercing, sealing tapping screw engineered for roofing and siding applications where a weathertight fastener is required. Manufactured from heat-treated C1022 steel with a case-hardened finish, each screw features a 1/4-inch across-flat high-hat hex washer head with an assembled EPDM washer that conforms to the surface and maintains a secure, long-lasting seal. The twin-lead Type 17 point combined with hi-lo threads reduce drive time and increase pullout resistance compared to standard screw profiles. Sold in packs of 250 pieces, this fastener is a practical stocking item for metal roofing and panel installation crews.

These screws are intended for metal-to-wood fastening in residential and light commercial roofing and siding installations. The EPDM washer assembly makes them well suited for exposed fastener metal roof panels and metal wall cladding systems where weatherproofing at each fastener point is critical. The green powder coat is applied over a dacro base coating that has passed a 1,000-hour salt spray test, making this screw appropriate for outdoor environments with prolonged moisture exposure. Installers working with standing-seam adjacent panel systems or corrugated metal siding will find the hi-lo thread profile particularly useful in softer wood substrates such as OSB and dimensional lumber.

Key Features

• Self-piercing Type 17 point eliminates the need for a pilot hole in standard roofing and siding applications
• Twin-lead hi-lo threads provide faster seating and greater pullout resistance
• 1/4-inch across-flat hex washer head with pre-assembled EPDM washer for a conforming, weathertight seal
• Heat-treated C1022 steel with case hardening for structural integrity under load
• Dacro base coating with green powder coat topcoat passes 1,000-hour salt spray test
• Packed 250 pieces per unit for efficient job-site use

Compatibility

Designed as a metal-to-wood fastener for exposed-fastener roofing and siding panels installed over wood structural substrates including OSB, plywood, and dimensional lumber framing.

Installation Notes

Installation is typically performed by roofing or siding contractors using a hex-head driver bit matched to the 1/4-inch across-flat head. Drive speed should be controlled to avoid overdriving, which can compress the EPDM washer beyond its effective sealing range and reduce pullout resistance. Follow applicable building code requirements for fastener spacing, edge distance, and penetration depth into the substrate. Do not mix dacro-coated fasteners with incompatible dissimilar metals that could cause accelerated galvanic corrosion.

Technical Specifications

• Material: Heat-treated C1022 steel, case hardened
• Screw Length: 1-1/2 inches
• Head Style: High-hat hex washer head
• Hex Size (Across Flat): 1/4 inch
• Washer Type: EPDM (Ethylene Propylene Diene Monomer), assembled
• Point Type: Twin-lead Type 17
• Thread Type: Hi-lo
• Coating: Dacro base with green powder coat topcoat
• Corrosion Rating: 1,000-hour salt spray test
• Quantity per Pack: 250 pieces
• Pack Weight: 2.57 pounds
• UPC: 00810468002818

Standard Information

• Brand: ACORN
• Manufacturer Part Number: SW-MW15FG250