Self-locking keeps tools like screw jacks from unwinding under ... lengthwise against a rotating workpiece, or with a tap (for internal threads) or a die (for external threads).

Learn the best methods for adding threads to 3D printed parts, from tapped holes to metal inserts, for stronger and more ...

The process of cutting threads in the wall of a hole is known as tapping. Sheet metal screws are known as self-tapping fasteners because they cut their own threads into the material (aluminum or p ...