Bolt Drill Hole Size

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

 

Twist Bolts Drill Hole Dia. Min. Drill Hole Depth
6mmx80mm 1/2” 3-1/2″
6mmx100mm 1/2″ 100 mm or 4″
6mmx150mm 1/2″ 160 mm or 6″
8mmx100mm 18 mm 100 mm or 4″
8mmx150mm 18 mm 160mm or 6″
     
Solid Leg Bolt, (SLB’s)    
8 mm x 80 mm 10 mm 90 mm or 3-1/2″
8 mm x 100 mm 10 mm 100 mm or 4"
10 mm x 80 mm 12 mm 90 mm or 3-1/2″
10 mm x 100 mm 12 mm 100 mm or 4″
10 mm x 150 mm 12 mm 160mm or 6″
12 mm x 100 mm 14 mm 100 mm or 4″
12 mm x 150 mm 14 mm  160 mm or 6″
Wedge Bolts    
10 mm x 80 mm 10mm 90 mm or 3-1/2″
10 mm x 100mm 10mm 100 mm or 4″