Lag Screws Hex Zinc Plated 3/8X4 are a trustworthy solution for securing heavy timber and structural wood connections. Featuring a hex head for easy driving and a durable zinc-plated finish, these lag screws deliver superior grip and long-lasting corrosion resistance for outdoor decks, fences, pergolas, and framing projects.

Designed for strength and reliability, these lag screws measure 3/8 inch diameter and 4 inches long, providing substantial holding power in dense woods. The hex drive allows for fast, tool-friendly installation with a wrench or socket, while the zinc plating guards against rust in damp or exposed environments.

Key benefits

• Heavy-duty holding power: ideal for timber-to-timber connections and structural framing
• Corrosion resistant: zinc-plated steel extends life in outdoor applications
• Easy installation: hex head supports quick driving with common tools
• Versatile: suitable for decks, fences, pergolas, and other wood projects
• Precise fit: sized 3/8″ x 4″ for standard heavy-duty joinery

Tip: Pre-drill pilot holes slightly smaller than the lag screw’s shank to reduce splitting and ensure a snug, secure fit. Use appropriate washers if needed and avoid over-tightening to preserve wood integrity and maximize holding strength.

WARNING: This product can expose you to chemicals including lead and lead compounds, which are known to the State ofCalifornia to cause cancer and birth defects or other reproductive harm. For more information go tohttps://www.P65Warnings.ca.gov.