Maybe your new drawer pulls came with screws that are too long, or you need to remove a damaged screw from a project.

The acting head of the Social Security Administration told a meeting of senior staff and legal-aid lawyers that Elon Musk’s ...

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, wrap it around a pencil ...

The dowel to be cut was loaded, and the machine ran back and forth enough times to create a very nice-looking screw thread. And once you’ve made two identical threaded dowels, you can use them ...