Hex washer head sheet metal screws. Self-drilling points that drill, tap, and fasten in 1 operation. Good for attaching almost any type of material to metal. Zinc. 100-piece pack.Self-Drilling Screw 1/4-14X1-1/2SKU: D64104$0.80PriceSIZE1/4-14X1-1/2QuantityAdd to Cart