Wire
Screws are made from steel or aluminum in wire coils. The wire is carefully chosen to match the design and application of the screw.
Heading: One-Die, Two-Punch
The wire is fed to the heading machine, which straightens and cuts the wire into a blank. The blank is then punched twice where the first punch partly shapes the head. The second punch shapes the final head shape including a potential recess.
Pointing
The drill point is shaped by punching two dies closely together around the tip of the headed blank, deforming the tip of the blank into the desired drill point.
Threading: Flat-die Rolling
The threads on the screw are formed by rolling the screw between two flat-dies with the desired thread design, giving the screw its characteristic look.
