Acorn SW-MW2BW250 Metal to Wood Screw 250 Count

Product Description

The ACORN SW-MW2BW250 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 a case-hardened finish, these screws are built for long-term field performance. 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 mating surface for a secure, weathertight seal. The twin-lead Type 17 point and hi-lo thread form deliver faster drive time and improved pull-out resistance compared to standard thread profiles. Sold in a 250-count pack weighing 3.092 pounds.

These screws are suited for residential and light commercial roofing and siding installations where metal panels, purlins, or flashing are fastened to wood substrates. The 2-inch length makes them appropriate for typical metal panel-over-wood-deck or metal-panel-over-purlin assemblies. The bright white powder-coat finish is applied over a dacro base coating that has passed 1,000-hour salt spray testing, making these screws appropriate for exterior exposure. Roofing and siding contractors, metal building erectors, and sheet metal tradespeople are the primary installers.

Key Features

• Self-piercing, sealing tapping screw — no pre-drilling required in typical applications
• Heat-treated C1022 steel with case hardening for high shear and pull-out strength
• EPDM washer assembled to hex head conforms to surface for a weathertight seal
• Twin-lead Type 17 point and hi-lo threads for faster drive and greater pull-out resistance
• Dacro base coating with bright white powder-coat topcoat passes 1,000-hour salt spray test
• 250 screws per pack for efficient job-site use

Compatibility

Designed as an OEM-style metal-to-wood fastener for roofing and siding applications involving metal panels or flashing fastened to wood substrates.

Installation Notes

These screws are installed by roofing and siding contractors using a hex-head driver bit sized to the 1/4-inch across-flat head. Drive speed should be controlled to avoid over-compressing the EPDM washer, which can compromise the seal. Follow applicable building code requirements and panel manufacturer fastener schedules for spacing and pattern. Inspect the EPDM washer seating visually after installation to confirm full surface contact.

Technical Specifications

• Material: Heat-treated C1022 steel, case hardened
• Screw Length: 2 inches
• Head Style: High-hat hex washer head
• Head Size: 1/4 inch across flat
• Washer Type: EPDM (Ethylene Propylene Diene Monomer), assembled
• Thread Type: Twin-lead hi-lo, Type 17 point
• Coating: Dacro base with bright white powder-coat topcoat
• Corrosion Resistance: 1,000-hour salt spray test
• Pack Quantity: 250 pieces
• Pack Weight: 3.092 pounds
• UPC: 00810468001095

Standard Information

• Brand: ACORN
• Manufacturer Part Number: SW-MW2BW250