Screws:
A Screw is a type of fastener consisting of a narrow, pointed metal shaft that has a wide flat or rounded top and a ridge (called a thread) that goes around it in a spiral A screw is used to hold things together or to attach things. It is inserted into wood, metal, plastic, etc., by being turned which tighten the screw.
COMMON TYPES OF SCREWS:
| Screw Type | Design and Use |
|---|---|
| Wood Screws | The shank is designed to be threaded only partially and are generally for attaching timber pieces. |
| Concrete Screws | These are constructed from hard materials, such as stainless or carbon steel. Used to attach various materials to concrete. |
| Masonry Screws | Often can be recognized by their blue hue. They’re screwed into pilot holes in the masonry profession. |
| Double-ended (Dowel) Screws | Unique in the screw family, no head, they have 2 pointed tips instead. For constructing hidden joints between timber pieces. |
| Drive Screws | Often can be recognized by their blue hue. They’re screwed into pilot holes in the masonry profession. |
| Drywall Screws | A bulged head, sometimes with a black phosphate coating. Great for attaching drywall to a metal stud or timber. |
| Chipboard Screws | As the name implies, this screw has a wax coating meant to screw chipboard flooring into place. |
| Lag Bolt or Screws | Designed with a hexagonal head. A heavy duty screw/bolt meant for wood. |
| Decking Screws | Essentially longer screws. Great for decks (as the name suggests). |
| Twinfast Screws | This screw can be screwed or driven twice the speed of other screw types due to its double thread design. |
| Mirror Screws | A concealed head for design purposes, often in the form of a decorative dome. |
| Eye Bolts or Screws |
This design utilizes a looped head for where it attaches, making it a common choice for threading wires on buildings and surfaces. |
| Security Head Screws | A one direction screw. This is an non-reversible, one way screw, making it great for security purposes. |