Minerallac Cully Tapcon Concrete Screw, 3/16 in Diameter, 2-3/4 in Overall Length, Hex Washer/Slotted Head Drive, Steel, 5/32 in Drill, Blue Climaseal Coated, Applicable Materials: Block, Brick and Concrete, Patented Advance Threadform Thread, 0.249 in W x 0.152 in H Head