Lag screws, or lag bolts, are sturdy fasteners designed to join heavy materials under a large load. They are distinguishable from other screws by their size, coarse threading that only extends part of the way up the screw, and the requirement for a pre-drilled hole in the materials before securing with the bolt.

Types of Lag Screws

Lag screws are available in a variety of lengths, finishes, and thread sizes. Some popular types include eye lag screws, wood lag screws, Phillips head lag screws, and concrete lag screws, which can be made from materials such as stainless steel for added strength.

Applications for Lag Screws

Lag screws are commonly used across industries such as construction, engineering, and manufacturing. They secure large materials together, like timber beams or metal plates. Homeowners may use them for projects like building decks or attaching furniture.

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