tågskruvar

Tågskruvar, also known as coach screws or lag screws, are a type of fastener commonly used in woodworking and construction. They are characterized by a screw thread on one end and a bolt head on the other, typically with a hexagonal or square shape for easy gripping with tools. The unthreaded portion of the shank below the head is designed to provide extra strength and stability to the joint.

These screws are driven into a pre-drilled pilot hole, which is crucial to prevent splitting of the wood and to ensure proper engagement of the threads. The pilot hole diameter should be slightly smaller than the screw's root diameter. Tågskruvar are often used for applications where significant load-bearing capacity is required, such as connecting heavy timbers, attaching hardware to wooden structures, or in various outdoor projects like deck building and fence construction.

The design of a tågskruv allows for a strong and durable connection. The wide head distributes the clamping force over a larger surface area, and the coarse threads provide excellent holding power in wood. They are generally made from steel and are available in various finishes, including galvanized or stainless steel, to provide corrosion resistance for outdoor or damp environments. While manual driving is possible with a wrench or socket, power tools with appropriate drivers are often used for efficiency, especially in larger projects. Their robust nature makes them a reliable choice for structural wood connections.