<p>This Architectural Drawing is AutoCAD 2d drawing of Screw 2d cad blocks in AutoCAD, dwg file. A screw is <strong>a mechanism that converts rotational motion to linear motion, and a torque (rotational force) to a linear force</strong>. It is one of the six classical simple machines. The most common form consists of a cylindrical shaft with helical grooves or ridges called threads around the outside.</p>