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Drywall screws are primarily used to secure gypsum boards (drywall or plasterboard) to either wood or metal studs. They feature a bugle head designed to sink slightly into the drywall without tearing the paper surface cover.
Fine thread drywall screws are designed for fastening drywall to light-gauge metal studs because the close threads grip thin metal better. Coarse thread screws have wider threads that bite securely into wood studs, making them ideal for timber framing.
The black phosphate coating provides moderate rust and corrosion resistance. It also creates a rougher texture that improves the adhesion of joint compound (mud) and paint after installation.
Self-tapping (or self-drilling) drywall screws should be used when attaching drywall to heavier-gauge metal studs (usually 20 gauge or thicker). Their drill-point tips allow them to cut through metal without pre-drilling.
Collated drywall screws are held together on plastic strips, allowing them to be loaded into auto-feed screw guns. This setup significantly speeds up installation and increases efficiency on large-scale commercial or residential projects.
