Acorn SW-MW15BN250 Metal to Wood Screw Brown 250 Count

Product Description

The ACORN SW-MW15BN250 is a self-piercing, self-sealing tapping screw designed for roofing and siding applications where a weather-tight fastening is required. Manufactured from heat-treated C1022 steel with case hardening, each screw features a 1/4-inch across-flat high-hat hex washer head fitted with an assembled EPDM (Ethylene Propylene Diene Monomer) washer that conforms to the mating surface for a durable, long-lasting seal. The twin-lead Type 17 point combined with hi-lo threads delivers faster drive time and improved resistance to pull-out. All screws receive a 1,000-hour salt-spray-tested dacro base coating, with an additional powder coat applied in brown over the dacro for color-matched applications. Sold in a pack of 250.

These metal-to-wood screws are suited for attaching metal roofing panels, metal siding, and similar sheet-metal-over-wood substrate assemblies in both residential and light commercial construction. The EPDM washer seals the fastener penetration point, making them appropriate for exposed exterior installations where moisture intrusion must be controlled. Roofing contractors, siding installers, and general construction tradespeople are the typical installers. The brown powder coat finish is intended for use with color-matched panel systems to provide a cleaner finished appearance at the fastener location.

Key Features

• Self-piercing, self-sealing design for metal-to-wood substrate fastening
• Heat-treated C1022 steel with case hardening for high pull-out resistance
• 1/4-inch across-flat high-hat hex washer head with assembled EPDM washer for weather-tight sealing
• Twin-lead Type 17 point and hi-lo threads for faster driving and superior pull-out resistance
• Dacro coating tested to 1,000-hour salt spray resistance, with brown powder coat over dacro base
• Sold in a pack of 250 pieces

Compatibility

Designed for metal-to-wood roofing and siding fastening applications where a 1-1/2-inch self-piercing hex washer head screw with an EPDM sealing washer is specified.

Installation Notes

Installation is performed by roofing and siding contractors using a hex-head driver bit sized to the 1/4-inch across-flat hex head. Drive screws to a snug fit so the EPDM washer seats flush against the panel surface without over-compression, which can compromise the seal. Follow applicable building codes and manufacturer panel installation instructions for fastener spacing and edge distance requirements. Do not overtighten, as excessive torque can distort the washer and reduce sealing effectiveness.

Technical Specifications

• Material: Heat-treated C1022 steel, case hardened
• Length: 1-1/2 inches
• Head Style: High-hat hex washer head
• Hex Size: 1/4 inch across flat
• Washer Type: Assembled EPDM sealing washer
• Point Type: Twin-lead Type 17
• Thread Style: Hi-lo
• Coating: Dacro base coat, 1,000-hour salt spray rated
• Finish: Brown powder coat over dacro
• Pack Quantity: 250 pieces
• Pack Weight: 2.565 pounds
• UPC: 00810468008711

Standard Information

• Brand: ACORN
• Manufacturer Part Number: SW-MW15BN250