L.H. Dottie TEKHW141 Self Drilling Screw, Hex Washer Head, 14 by 1-Inch Length, 3/8-Inch Hex, Zinc Plated, 100-Pack Self drilling Hex washer head Zinc plated steel Invincibox up to 2-Inch length number 14 by 1-Inch length, 3/8-Inch hex