Lag screws are heavy-duty fasteners used to connect lumber and other materials that support a high load. These threaded fasteners are different from other more common types of screws, such as wood or sheet metal screws, and feature a larger head that spreads the torque across multiple sides for high-strength performance. They are also available in a variety of sizes and materials.

Hex lag screws are most commonly made from steel or hot-dipped galvanized, but they may also be available in stainless steel for corrosion resistance and harsh environments. These fasteners are available in a variety of finishes, such as zinc plating or black oxide, to suit the specific needs of each application.

In addition to their hex head, which makes them easy to install and remove using socket wrenches, hex lag screws have six points of access in tight spaces, making them more efficient for applications where space is limited. This type of screw can be used to attach or fasten equipment and machinery, as well as masonry and construction projects that utilize wood and other material.

Lag screws differ from wood screws in that they require a hole to be drilled prior to installation. This allows them to hold the workpiece more securely than normal wood screws, which only thread as they enter the material. These fasteners are also differentiated by the fact that they do not have a sharp tip, but instead a gimlet point to help with drilling. hex lag screws