Wire is uncoiled, straightened and cut to length
The steel wire is moulded into the correct shape at room temperature using cold forging / forming  / heading machines.
The head of the bolt or screw is progressively formed by forcing the steel into various dies at high pressure.
The screw or bolt threads are formed by rolling or cutting.
The fastener is exposed to extreme heat to harden the steel.
The surface is treated depending on the application.
The fasteners are quality checked to ensure uniformity and consistency, and then packed for despatch.