Lag screws, or lag bolts as they are sometimes called, are threaded fasteners that can be used to connect materials like wood. They have a hex head that makes them easier to drive into wood using a wrench or socket, which speeds up installation time. Lag screws are designed to hold up in applications where there is heavy-duty torque, which makes them a better choice for construction and industrial projects than other common screw types.
The hex head of a lag screw is one of the main differences between it and other traditional screws, such as wood or sheet metal screws. They also have coarse threading, which is more spaced out than other types of screw threading and has fewer threads per axial distance. This gives the screw a stronger grip on materials and allows it to support heavier loads.
There are several different kinds of lag screws, and the type you choose will depend on what your project is. For example, residential or commercial construction projects might call for a screw that matches the design of the building, while a heavy-duty outdoor industrial project may require a more durable, corrosion-resistant material.
Portland Bolt offers hex lag screws in a variety of sizes and materials, including carbon steel, 304 stainless steel, hot-dip galvanized (HDG) and silicon bronze. Lag screws that are coated with a zinc plated finish or a chromated finish provide rust resistance and are suitable for use indoors or in harsh outdoor environments. For larger-diameter lag screws, it is important to drill a pilot hole before installing the screw to prevent over-torque. hex lag screws