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Different screws are made for different handyman jobs. Ones with larger heads apply more bearing pressure against the surface to which they are attached. This is especially true when a washer is placed under the head. Also, with a larger bearing area, there is a lesser chance the material will pull out from the screw.
A machine screw has finer threads than a wood screw and is made to mate with a nut or a tapped hole. A sheet metal screw is a stubby screw but has coarse threads, and a self-tapping screw drills its own hole as it screws into the material.
A drywall screw is typically a universal screw. They are sharp, come in coarse or fine threads and can make quick work of a project. However, this screw is brittle and has poor shear strength. It can snap or shear with moderate stress so you sure don’t want to use these for cabinets.
When screwing two surfaces together, another trick is to use a bar of soap. Rub the threads of the screw on the bar so there are flakes of the soap all over the screw threads. You can also wrap the screw threads with Teflon tape. Either one of these act as a lubricant to make the screw sink into the hole like a hot knife through butter.
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