It’s a clever but simple machine that takes an unruly pile of screws or nuts and bolts, and delivers them in a line the correct way up. They do this by shaking the pile of fasteners in a ...

because first machine to cut screws was built in 1568 by a French mathematician, Jaques Besson. The first nuts and bolts appeared in the middle 1400's. The bolts were just screws with straight ...

Screw threads are another simple machine, and can be thought of as a ... The simplicity of screw threads and the ubiquity of threaded fasteners belie the physics behind these mechanisms, but ...

Washers are a vital component in nearly every assembly and fastening process, so it’s important to understand the variety of ...