The Hillman Slotted Hex Head Sheet Metal Screws, or tapping screws, are highly versatile. Though these sheet metal screws are designed to attach metal to metal, they're also used to attach metal to wood, fiberglass, and plastic. Great for general repair around the house, the sharp threads of these hex washer head sheet metal screws draw materials together and ensure a secure hold. Designed for joining metal objects, and attaching metal to wood, fiberglass and plastic Hex head sheet metal screws feature sharp threads that ensure secure hold Zinc finish for moderate corrosion protection Pre-drilled hole required for these sheet metal screws Hex washer head sheet metal screws measure #14 diameter x 1" length Design makes it easy for them to tap into and tighten against whatever they are being installed into