Are “screw machines products” primarily screws?
Not at all. The term “screw machine product” is really a misnomer today. One hundred years ago, when the term was first applied to a mechanically automated lathe, the primary use for the machine was for making screws. Today your hardware store variety “screw” is typically made by the cold heading process, which is more expensive to tool and less precise but provides a lower cost per piece. Screw machines are used for an endless variety of products turned from bar stock, far beyond the simple nuts and bolts of the past.
