Hillman Fasteners 48603 Exterior Deck Screw 3.5 in No. 10

Product Description

The HILLMAN FASTENERS 48603 is a bronze ceramic-coated exterior deck screw designed for outdoor fastening applications in wood decking, framing, and structural assemblies. The screw measures 3.5 inches in length and is sized at Number 10 diameter. It features a self-drilling point that eliminates the need for pre-drilling in most applications, along with a Star drive head and Borefast thread pattern engineered for fast, clean penetration. The bronze ceramic coating is rated for 2000-hour salt spray resistance, making it suitable for treated lumber and coastal or high-humidity environments. A knurled shank section below the head helps prevent surface wood splitting on deck boards.

This screw is intended for residential and light commercial exterior wood construction. Typical applications include deck board installation, fence assembly, and pressure-treated lumber fastening where corrosion resistance is a primary concern. The package contains 12 screws per box. Licensed contractors, carpenters, and experienced DIYers working on exterior projects will find this screw appropriate for code-compliant treated lumber assemblies.

Key Features

• Bronze ceramic coating rated for 2000-hour salt spray resistance for long-term exterior durability
• Self-drilling point reduces installation time and eliminates pre-drilling in most wood substrates
• Star drive head for high-torque engagement and reduced cam-out
• Borefast thread pattern designed for fast, consistent thread engagement in wood
• Knurled section beneath head reduces splitting in deck board surface wood
• Lifetime warranty included

Compatibility

Designed as an OEM-style exterior fastener for use with pressure-treated lumber, composite-ready decking substrates, and standard dimensional wood framing in outdoor applications.

Installation Notes

Installation is performed by carpenters and general contractors using a star-bit driver or impact driver set to appropriate torque to avoid overdriving. Always confirm fastener compatibility with the specific treated lumber rating and local building code requirements before installation. Follow IRC and applicable local deck construction codes for fastener spacing and penetration depth. Do not use this screw in applications requiring stainless steel where local code mandates it for specific preservative-treated lumber types.