What size pilot hole do I need for a 3/8 lag bolt?
|Bolt Dia||Shank (Unthreaded)||Pilot Hole Dia|
Hereof, how big should a pilot hole be for a lag bolt?
Furthermore, what size should pilot holes be? For most hardwoods, the pilot hole should be at least as large as the screw's minor diameter. If the screw has deep threads, or the wood is very hard, the pilot hole should be another 1/64-in. larger than the minor diameter. For softer woods, the pilot hole can be 1/64-in.
Moreover, how do you drill a pilot hole for a lag bolt?
When they're lined up, clamp them together so they stay in place. Then, using a bit with a slightly smaller diameter than your lag screw, drill a hole all the way through the materials where you want the screw to go. Since lag screws have hex heads, you can't use a regular screwdriver to tighten them.
What is the shear strength of a 3/8 lag bolt?
Values also are based on lag screw bending yield strength values of 45,000 psi for screws of 3/8 inch and larger diameter, 60,000 psi for 5/16 inch diameter and 70,000 psi for 1/4 inch diame- ter.