Pilot or lead holes are typically used to ease the installation of lag bolts. Refer to the chart below for commonly accepted hole sizes. There are a number of variables that may change the required pilot hole dimensions including bolt length, diameter and wood species. For questions regarding specific applications, consult an engineer.

Click here to download a printable PDF chart of these lag bolt pilot hole diameters.

 

Have a question about lag bolts? Contact us for the answers you need!