Lag

A lag screw, also known as a lag bolt, is a heavy-duty fastener used for securing materials to wood or other surfaces. It is a type of threaded fastener with a pointed tip and a coarse, deep thread that allows it to grip into the material it is being driven into. Lag screws are commonly used in construction and carpentry applications, such as attaching wooden beams, posts, or joists to other wooden structures or to concrete. They are typically made of steel or other durable materials, and their large size and strong grip make them suitable for handling heavy loads and withstanding high stress. Lag screws are typically installed using a power drill or impact driver, and require a pre-drilled hole in the material being fastened to. They are commonly used in combination with washers and other hardware components to provide additional strength and stability to the fastened structure.