5/8" Hex Head Lag Bolts Galvanized Steel for Structural Builds

Hillman Paulin 3/8" x 3" Lag Bolts – Hot Dipped Galvanized Hex Head 

When your structural connections demand reliability, our 3/8 lag bolts deliver exactly that. Sourced from Hillman Paulin — a name trusted by contractors and tradespeople across Ontario — these hex lag bolts are hot-dip galvanized for superior corrosion resistance. Whether you're anchoring lumber, securing deck framing, or working through demanding commercial builds, these bolts hold firm where it counts.

Hillman Paulin lag bolts (lag screws) are a heavy-duty fastening solution for wood construction and metal-to-wood connections where standard wood or deck screws are not strong enough. These 3/8" x 3" hot dipped galvanized lag bolts deliver superior holding power for decks, fences, pergolas, wood structures, and treated lumber installations.

Designed for structural applications, these hex head lag bolts can be installed directly into wood with pre-drilled pilot holes, or into masonry when paired with lag shields, giving maximum versatility on the jobsite. In wood-to-wood connections, the non-threaded shank helps pull the second piece of wood tightly against the first for a secure, long-lasting joint.

For best performance, use with flat washers or fender washers to create a larger bearing surface and prevent the head from embedding into the wood. The hot dipped galvanized finish offers a high level of corrosion resistance compared to standard zinc-plated steel, making these lag bolts ideal for outdoor and exposed environments.

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Key features

• Brand: Hillman Paulin – trusted, contractor-grade fasteners

• Size: 3/8" diameter x 3" length

• Head type: hex head lag bolt (lag screw)

• Finish: hot dipped galvanized for superior rust and corrosion resistance

• Ideal for decks, fences, pergolas, sheds, and exterior wood structures

• Excellent for wood-to-wood and metal-to-wood construction

• Works with pilot holes in wood or lag shields in masonry

• Compatible with flat or fender washers for improved load distribution