The design starts with a thin-walled, flexible cylinder with "zero-pitch" threads. The threads basically form ridges around the cylinder. A longitudinal slit along the cylinder's entire length lets ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...

Screws may be commonplace, but that doesn't mean they're simple. A screw is any shaft with a corkscrew groove carved around its surface and, regardless of their design, screws are usually used to ...