Lag screws, also called hex lag bolts, are threaded fasteners with a sharp tip and coarse threading. They are designed to connect wood and other materials that will bear intense load, and they’re a heavy-duty alternative to other screw types like wood screws or sheet metal screws.
Lag bolts are commonly used to anchor wood beams, joists and other supports in construction and other applications. Their defining feature is that they are significantly larger than other screws and require a pre-drilled hole to install. When using lag bolts, it is important to ensure that the materials are properly aligned before installing them. This will reduce stress on the screw, preventing it from breaking or stripping inside of the hole.
The hex head on a lag screw allows it to be driven with a socket wrench, which can speed up installation time. Portland Bolt offers hex lag screws in several different lengths and materials, including hot dipped galvanized and stainless steel. Lag screws that are hot dipped galvanized (HDG) have a molten zinc bath finishing process, creating a tightly bonded alloy coating on the screw to protect them from corrosion.
Stainless lag bolts, which are made of austenitic stainless steel, have better corrosion resistance than their HDG counterparts. They also have an annealing process, which hardens the material, making it more durable than standard steel. Like hex lag bolts, stainless lag screws can be used alone or with lag shields to increase their durability and prevent rust. hex lag screws