Below are six common types of screws. #1) Wood Screw. Perhaps the single most common type of screw is a wood screw. ... #2) Machine Screw. A machine screw, as the name suggests, is a type of screw that's used in machining applications. ... #3) Lag Screw. ... #4) Sheet Metal Screw. ... #5) Twinfast Screw. ... #6) Security Screw. 23 Aug 2019