Hillman Fasteners 47877 Lag Screws 5/16x4 in 100 Pack

Product Description

The HILLMAN FASTENERS 47877 is a 100-pack of 5/16 inch x 4 inch construction lag screws engineered for demanding outdoor structural applications. These fasteners feature Star Drive technology that virtually eliminates cam-out, delivering a smooth, controlled drive on every installation. Patented cross-cut threads combined with a wood-biting cut point work together to reduce wood splitting by grinding and removing fibers ahead of the screw shank. Licensed contractors, carpenters, and deck builders reach for these when fastening structural lumber in high-load assemblies.

These lag screws are suited for residential and light commercial construction projects where structural fastening of wood members is required. Common applications include deck framing, stair stringers, and playset structural connections. The fasteners are rated for use with treated lumber, making them a practical choice for ground-contact and weather-exposed assemblies where preservative-treated material is specified by code.

Key Features

• Star Drive recess virtually eliminates cam-out for consistent, controlled driving
• Patented cross-cut threads reduce wood splitting during installation
• Wood-biting cut point grinds and removes fibers to clear the hole ahead of the threads
• Compatible with treated lumber for outdoor and ground-contact applications
• 100-piece pack supports production framing and multi-fastener structural connections
• 5/16 inch diameter x 4 inch length suits standard structural lumber fastening

Compatibility

Designed as a structural lag screw for use with treated and untreated dimensional lumber in outdoor construction assemblies including decks, stairs, and playsets.

Installation Notes

Lag screws of this diameter typically require a pilot hole to prevent splitting, especially in dense or dry lumber. A licensed carpenter or general contractor should verify fastener spacing and embedment depth against applicable building codes before installation. Disconnect any adjacent electrical service and ensure structural loads are properly supported before removing or replacing existing fasteners. Use an impact driver or heavy-duty drill with the correct Star Drive bit to maintain engagement and avoid fastener damage.