They hold together everything from the most delicate watch to the largest bridge. The world is literally kept from coming apart by screws and bolts, and yet we don’t often give a thought to these ...

Self-tapping screws are also one of the most important tools at home as well as in metalwork. These distinctive ...

Translating rotary motion to linear motion is a basic part of mechatronic design. Take a look at the nearest 3D-printer or CNC router — at least the Cartesian variety — and you’ll see some mechanism ...

Shoulder screws, also known as shoulder bolts and stripper bolts, are machine screws with an integral shoulder or journal between the head and thread. Although they are not readily available in local ...

One of the most critical factors in determining the reliability of a threaded-fastener joint is the force the tightened fastener exerts on an assembly, which is known as preload. And preload depends ...

Back when hardware meant bony plates and flesh-rending teeth, a living version of the humble screw evolved naturally in, of all places, the leg joints of weevils. The legs of at least 15 kinds of ...