Screws with coarse threads and a drill point end for use in thicker gauge steel.
Flat heads are countersunk (cone shaped under the head) with a flat top. Phillips drive is x-shaped for installation with a Phillips screw driver. Self drilling screws have a drill bit point.
A stainless alloy that is harder than 18-8 stainless steel, but not as resistant to corrosion.
Hex washer heads are six sided for use with a wrench and have a built-in washer. Self drilling screws have a drill bit point.
Screws with a smooth shank and tapered point for use in wood.
Construction screws intended for fastening drywall sheets to studs.