Acorn SW-MW15LS250 Metal to Wood Screw 250 Count

Product Description

The ACORN SW-MW15LS250 is a self-piercing, sealing tapping screw designed for roofing and siding applications where a weather-tight fastening point is required. Manufactured from heat-treated C1022 steel with a case-hardened finish, the screw measures 1-1/2 inches in length and features a 1/4-inch across-flat high-hat hex washer head with an assembled EPDM (Ethylene Propylene Diene Monomer) washer. The EPDM washer conforms to the mating surface under torque, creating a durable, long-lasting seal. A twin-lead Type 17 point combined with hi-lo threads reduces drive time and increases pullout resistance. Each screw carries a dacro coating that has passed a 1,000-hour salt spray test. This pack contains 250 screws.

These metal-to-wood screws are suited for attaching metal roofing panels, metal siding, and similar sheet-metal cladding directly to wood structural members. The self-piercing Type 17 point eliminates the need for a pilot hole through the metal layer, speeding up installation on residential and light commercial projects. The hex washer head accepts a standard 1/4-inch hex driver bit. Color options feature an additional powder coat applied over the dacro base for finish-matched installations.

Key Features

• Self-piercing Type 17 point eliminates pilot drilling through metal
• Twin-lead hi-lo threads for faster drive time and higher pullout resistance
• Assembled EPDM washer seals against moisture intrusion at the fastener point
• 1/4-inch across-flat high-hat hex washer head for standard hex driver compatibility
• Dacro coating rated to 1,000 hours salt spray for corrosion resistance
• Heat-treated, case-hardened C1022 steel construction

Compatibility

Designed for metal-to-wood fastening applications including metal roofing and metal siding panels attached to wood framing or sheathing.

Installation Notes

Installation is typically performed by roofing or siding contractors using a variable-speed screw gun fitted with a 1/4-inch hex drive bit and a depth-sensitive nosepiece to prevent over-driving and EPDM washer deformation. Fasten only to dry, structurally sound wood substrate. Follow applicable building codes and manufacturer panel guidelines for fastener spacing and edge distance. Over-driving will compress the EPDM washer excessively and compromise the seal.

Technical Specifications

• Length: 1-1/2 inches
• Head Style: High-hat hex washer head
• Hex Size: 1/4 inch across flat
• Point Type: Twin-lead Type 17
• Thread Type: Hi-lo
• Washer Material: EPDM (Ethylene Propylene Diene Monomer)
• Base Material: Heat-treated C1022 steel, case hardened
• Coating: Dacro, 1,000-hour salt spray rated
• Pack Quantity: 250 pieces
• Pack Weight: 2.565 pounds
• UPC: 00810468002832

Standard Information

• Brand: ACORN
• Manufacturer Part Number: SW-MW15LS250