Hex Lag Screws, also called Lag Bolts, are substantial hex head screws designed for high-load wood-to-metal or wood-to-wood fastening. These screws are extremely durable and can support a much heavier load than typical wood or sheet-metal screws, making them ideal for structural framing, deck construction, or mounting heavy fixtures such as flat-panel TV brackets.
To install, always pre-drill a pilot hole to prevent splitting the wood due to the larger diameter of the screw. We offer lag screws in both stainless steel and zinc-plated steel depending on your application needs—zinc-plated for maximum strength and stainless for corrosion resistance in outdoor or marine environments.
Common Uses:
Lag screws are commonly used for structural framing, deck supports, equipment mounting, and other heavy-duty wood connections.
Note: Lag screw lengths are measured from under the head to the point of the screw.
What are lag screws used for?
For high-strength fastening—deck framing, wall/TV mounts, and wood-to-metal connections—when through-bolting or a nut isn’t practical.
Are “lag bolts” and “lag screws” the same thing?
Yes. The terms are used interchangeably for large hex-head fasteners with coarse lag threads.
Do I need to pre-drill?
Yes. Always drill a pilot hole slightly smaller than the screw’s diameter to prevent splitting and ensure straight installation.
Stainless vs. zinc-plated—what’s the difference?
Zinc-plated steel typically offers higher tensile strength; stainless provides superior corrosion resistance for outdoor or wet environments.
