Structural lag screws are used to fasten lumber and other heavy materials together, especially in wood applications that must withstand significant stress or intense load bearing. They are incredibly sturdy and come in sizes between 5/16″ and 3/8″. They have hex heads that make them easy to grip with a wrench or socket, and they can be used indoors or outdoors depending on the application.

Lag bolts are often confused with wood screws because they both have hex heads and similar appearances, but there are some key differences between the two that should be noted. Wood screws are tapered and have relatively coarse threading, while lag screws are not. Lag screws require a predrilled hole, and their threads are designed to screw into the material they are connecting.

In contrast, wood screws are designed to be driven into place without the need for a predrilled hole. They also have finer threading and are not intended to be screwed into materials with precision-matched holes.

Regardless of whether they are being driven by hand or power tools, it is important to not over tighten these heavy-duty fasteners. Over tightening can cause them to work their way out of the material and can result in them popping their heads if not installed correctly. For this reason, it is essential to understand how much torque can be safely applied to lag bolts before you begin driving them into your application. It is also important to use washers with lag bolts to increase the surface area of contact between the screw and the material, which can help reduce the chance of them working out of the threads. lag screws for wood

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