Drywall screws have an extra sharp point that easily penetrates the plasterboard.
They have a bugle head (Phillips) which helps prevent surface damage and ensures a flush finish. A bugle head is a type of countersunk head that has a sweeping curve to the underside of the head, much like the mouth of a bugle. The curved head prevents the paper finish of the plasterboard from tearing as it is screwed in.
Drywall Screws for Thin Sheet Metal
There are also drywall screws for thin sheet metal. These can be used to fix plasterboard to thin sheet metal frames. It has a finer thread than timber drywall screws and a very sharp point to penetrate the metal.
Drywall screws for thin sheet metal are supplied in a zinc plate finish.
Drywall Screws for Heavier Gauge Material
This type of drywall screw is used to fix plasterboard to heavier gauge metal studs up to 2.5mm thick. It has a finer thread than timber drywall screws to ensure firm engagement with the metal and a self-drilling point to penetrate the metal.
Drywall screws for heavy gauge metal are supplied in a zinc plate finish.
Do Plasterboard Screws Rust?
The coating of a plasterboard screw helps keep rust at bay to an extent, though it is inevitable that the screws will eventually rust. The black phosphate coating does prevent rusting and corrosion for a limited period of time. We would always recommend using collated drywall screws indoors since exposure to the elements can speed up the rusting process.
Can you use Drywall Screws for wood?
Plasterboard screws are named as such for a reason. We wouldn't recommend using screws for plasterboard on wood, as the brittle drywall screws can snap when installed into hardwood or thicker and more durable materials. This breakage can cause your substrates to be damaged and result in an unsafe installation, so only use drywall screws for their intended substrate.
How far apart should screws for plasterboard be?
For enhanced stability, most manufacturers recommend that screws for plasterboard are fixed no more than 16 inches apart. Some may choose to fix their drywall screws at around 12 inches apart - this is common with some builders to ensure the tighter spacing and better load support.