Hillman Fasteners 42499 Stainless Steel Exterior Screws 3in 10 25pk

Product Description

The HILLMAN FASTENERS 42499 is a 25-pack of stainless steel exterior screws designed for outdoor fastening applications where corrosion resistance and holding strength are critical. Each screw measures 3 inches in length and is sized No. 10, featuring a self-drilling point that eliminates the need for a pilot hole in most applications. The star drive head provides positive bit engagement and reduces cam-out during installation. A knurled shank section under the head reduces the risk of wood splitting, making these screws well-suited for decking, fencing, trim, and other exterior structural or finish work.

These screws are intended for exterior wood-to-wood fastening in residential and light commercial settings. The stainless steel construction makes them appropriate for treated lumber, cedar, redwood, and other materials prone to reacting with standard zinc or galvanized fasteners. Typical applications include deck boards, fascia, railings, siding, and outdoor furniture assembly. The self-drilling Borefast thread design speeds up installation in softwoods and composite materials without pre-drilling.

Key Features

• Self-drilling point eliminates pilot hole requirement in most wood substrates
• Star drive head reduces cam-out and improves torque transfer
• Knurled section beneath the head minimizes wood splitting on entry
• Stainless steel construction resists corrosion in exterior and treated-lumber environments
• Borefast thread pattern designed for secure holding in softwood and composite materials
• Backed by a lifetime warranty from the manufacturer

Compatibility

Designed as an OEM-style replacement and general-use exterior screw compatible with standard No. 10 star drive bit installations in wood framing, decking, and exterior finish applications.

Installation Notes

Installation is performed with a star drive (T-star) bit; confirm bit size matches the drive recess before fastening to avoid stripping. When fastening into hardwoods or dense composites, pre-drilling may still be recommended despite the self-drilling point. Follow applicable local building codes, including IRC deck-fastening requirements, when using these screws in structural applications. Avoid mixing stainless fasteners with dissimilar metals in wet environments to prevent galvanic corrosion.