About Threads

The screw and nut pair can be used to convert torque into linear force. As the screw (or bolt) is rotated, the screw moves along its axis through the fixed nut, or the non-rotating nut moves along the lead-screw. A screw thread is a helical or tapered structure used to convert between rotational and linear movement or force.

Screw threads have several applications:
-Fasteners such as wood screws, machine screws, nuts and bolts.
-Connecting threaded pipes and hoses to each other and to caps and fixtures.
-The worm ger and similar mechanical connections, used particularly in adjustment mechanisms.

There are 2 type of threads :
-External thread (male)
-Internal thread (female)