When would a finishing nail be preferred over a flathead wood screw?

A finishing nail would be preferred over a flathead wood screw when nailing boards that are hidden from view due to its design and application attributes. Finishing nails have a smaller head than traditional nails and screws, allowing them to be driven into the wood without leaving a noticeable mark on the surface. Once installed, the small heads can be easily concealed with wood putty or paint, providing a smooth, aesthetically pleasing finish.

In situations where the appearance of the surface is important—such as trim work or cabinetry—the use of finishing nails minimizes the visual impact of the fasteners. They help achieve a clean look for applications where the joinery will not be visible, allowing for a professional finish without the prominence of screw heads.

The other options do not apply to the use of finishing nails. For instance, installing fence staples typically requires a sturdier fastening method, while fastening metal to metal often involves the use of screws, nuts, or bolts specifically designed for that purpose. Cutting glass requires specialized tools entirely unrelated to fastening techniques. Thus, the scenario involving hidden boards distinctly highlights the effectiveness and visual benefits of using finishing nails.