Built to Hold. Forged to Last: Explore Our Square Head Lag Screws Collection

When you're working with timber, heavy beams, or reclaimed lumber, you need fasteners that do more than just blend in — you need hardware that performs under pressure and adds character to the build. Old West Iron’s Square Head Lag Screws Collection offers exactly that: durable, American-made fasteners that bring historical charm and serious holding power to any project.

From rustic timber frames to industrial-style builds, these forged fasteners are built to be seen — and built to last.

What Are Lag Bolts?

Also known as lag screws, lag bolts are heavy-duty fasteners designed for anchoring wood and other materials. With coarse threads and a sturdy shaft, they’re ideal for structural applications like:

• Timber framing and beam joinery

• Deck construction

• Barn door hardware

• Pergolas and trusses

• Rustic furniture and cabinetry

• Gate and fence assemblies

Our square head design adds extra surface grip during installation and offers a distinctive historical look — especially popular in restoration projects and traditional builds.

Lag Screw Strength, Period-Correct Style

If you're building something worth showing off, your fasteners should match the craftsmanship. Each lag screw in our collection is available in multiple lengths and diameters, with hand-applied finishes like black, oil-rubbed bronze, raw iron, or antique pewter.

Choose from:

• Square head lag screws with visible historic-style profiles

• Hex and pyramid bolt heads for a more industrial or decorative aesthetic

• Custom sizing for unique applications

Pair them with decorative clavos, hinge straps, or beam brackets for a complete iron-accented look.

How Is a Lag Bolt Different from a Carriage Bolt?

Many builders confuse lag bolts with carriage bolts, but they serve different functions:

• A lag bolt (or lag screw) is a thick, wood-threaded screw installed without a nut. It bores directly into timber for a solid hold.

• A carriage bolt has machine threads and is designed to pass through pre-drilled holes, secured with a nut on the opposite side.

Lag screws offer a faster and more rugged connection, ideal for timber where back access for nuts isn’t possible — like anchoring into posts, joists, or ledger boards.

Ideal for Rustic, Industrial, and Historic Builds

Our square head fasteners are the go-to solution for builders and woodworkers who need both performance and period-correct looks. They’re especially suited for:

• Log cabins

• Barn restorations

• Western and ranch-style homes

• Historical renovations

• Timber frame architecture

• Custom woodworking

We offer matching washers, bolt heads, and decorative bolt covers to help you carry the theme throughout your build.

Why Choose Old West Iron?

• American-made from start to finish

• Hand-forged or machined with care in Idaho

• Custom finishes and sizing available

• Historically inspired, builder-approved

These are not your hardware-store fasteners. They're forged with purpose — built for homes, gates, and structures meant to last.

Browse our full collection of lag bolts to find the perfect lag screw or carriage bolt alternative for your next project.**

Bring strength, structure, and craftsmanship into every detail — right down to the fasteners.