Bolt Drill Hole Size

Please use the following table as an outline for bolt hole drill size.

Twist BoltsDrill Hole Dia.Min. Drill Hole Depth
6mmx80mm1/2”3-1/2″
6mmx100mm1/2″4″
6mmx150mm1/2″6″
8mmx100mm5/8″4″
8mmx150mm5/8″6″
Solid Leg Bolt, (SLB’s)
10mmx100mm1/2″4″
10mmx150mm1/2″6″
12mmx100mm9/16″4″
12mmx150mm9/16″6″
Wedge Bolts
10mmx80mm10mm3-1/2″
10mmx100mm10mm4″