forcing the wood apart. Screw threads are another simple machine, and can be thought of as a long, gently sloped inclined plane wrapped around a cylinder. Cut a long right triangle out of paper ...

Drywall screws are designed specifically for securing drywall to wood or metal studs. They’re made to grip tightly without ...

Thread: The ridge that wraps around the cylinder and forms a helix. Tip: The end of the screw. Wood screws, popular with DIYers, join two wood pieces together. “If you need screws that work well ...