What screw should be used to attach track to concrete sub floor ?

Start by pilot drilling the concrete with an 1/8-inch masonry bit then inserting construction adhesive and a wooden dowel. Check the depth and match the screw size to fit. Attach the track to the concrete with a small bead of adhesive then screw into the wooden dowels. Be sure the that dowels are flush with the floor surface to ensure a a good bond.