Self-tapping screws are usually drilled into pre-made holes (pilot holes) in metals, such as zinc, aluminum, and bronze and its alloys, as well as plastics and resin-impregnated plywood. They create ...

If you've had to follow any DIY video or guide that involves drilling into materials, chances are you've been instructed to drill a small hole in the material before inserting in your screws. While ...

These screws are used to cut or form a mating thread when driven into preformed holes. They permit rapid installation, since nuts are not used and access is required from only one side of the joint.