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″