Drywall screws are self-tapping screws that feature a bugle head design that connects drywall to studs. They are also known as sheetrock screws, and these screws have many uses. This is because they are relatively inexpensive, feature a flat head that is less prone to getting pulled through the wood, and are thin, making these self-tapping sheetrock screws less likely to split the wood. They are available with a coarse thread and fine thread.
Coarse Thread Drywall Screws
Screws with a bugle head, spaced threads, an extra sharp point, and a black phosphate finish. They are similar in design to particleboard screws however, those are available in shorter lengths. They are good for attaching drywall to wood studs or 25 gauge metal studs.
Fine Thread Drywall Screws
Screws with a bugle head, twin fast thread, extra sharp or self-drilling point, and black phosphate finish. The sharp point style is used for attaching drywall to metal studs from 25 gauge through 20 gauge thick, whereas the drill point will drive easily through drywall, drill a hole in a steel stud up to 14 gauge thick, and form its mating thread. The drill point drywall screw can also be used for attaching plywood or insulation board to 14 gauge metal.
Drywall Screw Uses
The main purpose for drywall screws is securing full sheets of drywall or partial sheets of drywall to either wood or metal studs. Before drywall screws came into widespread use, drywall was nailed into place with short, wide-head nails. While drywall nails are still around and do have their use as a quick way to fasten wallboard, drywall screws are the standard method of attaching drywall to studs.
Few woodworkers would ever use drywall screws for fine building. Avoidance of drywall screws is especially important with heavy or even moderate building tasks, critically with outdoor projects like fences and decks. But drywall screws can be used for light building projects or for temporary construction when safety is not a factor.