#10-16 x 3/4" in. Hex Washer Head Self-Drilling pole barn screws are designed for general construction applications such as HVAC duct work to steel framing, roof deck to steel framing, and roof clips to steel framing. The Drill Point is designed to penetrate a wide variety of metal thicknesses from thin sheet metal to 0.250" with no "point walking". These metal to metal fasteners come with a bonded sealing washer to create a greater degree of corrosion protection over conventional sealing washers.