Lag Bolt vs. Lag Screw: Key Differences Explained

Discover the key differences between lag bolts and lag screws for your construction projects.

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Lag bolts and lag screws are often used interchangeably, but they are essentially the same thing. Both have hex heads and are designed for heavy-duty fastening into wood or other materials. Lag bolts technically refer to bolts with a square or hex head, while lag screws refer to similar fasteners with a more aggressive threading designed to cut into the wood. Regardless, both serve the same function in construction and carpentry.

FAQs & Answers

  1. Can lag bolts be used in concrete? Lag bolts are designed primarily for wood, but they can be used in concrete with appropriate anchors.
  2. What materials are best suited for lag screws? Lag screws are ideal for heavy-duty fastening into wood, especially in construction and carpentry applications.
  3. Are lag screws stronger than regular screws? Yes, lag screws have a more aggressive threading and a larger diameter, making them stronger for heavy-duty applications.
  4. What tools do you need to install lag screws? To install lag screws, you typically need a wrench or socket, and it's helpful to pre-drill a pilot hole for easier installation.