Screws Types

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Types of Screws

Following are some common type of Screws:

1. Deck Screws

2. Hex Lag Screws

3. Self-Drilling Screws

4. Sheet Metal Screws

5. Wood Screws


1. Deck Screws:

 Deck Screws




Deck screws have a notched point at the tip to assist in chip removal during thread cutting which allows for a simple installation in wood and composite deck materials. A bugle head and square drive help to eliminate the stripping effect sometimes experienced with other types of drives.


2. Hex Lag Screws:

 Hex Leg Screws




Lag screws, also called lag bolts, are large wood screws. The head is external hex and are driven with a wrench. Used for lag together lumber for framing, machinery to wood floors, and other heavy duty applications.


3. Self-Drilling Screws:

 Self-Drilling Screws




Self-drilling screws have a sheet metal thread with a self-driller cutting (TEK) point to pierce through 20 to 14 gauge metals. The higher the TEK number, the larger the drill point to pierce heavier gauge metals.


4. Sheet Metal Screws:

 Sheet Metal Screws




Sheet metal screws have sharp cutting threads that cut into sheet metal, plastic or wood. They have a fully threaded shank and sometimes have a notched point at the tip to aid in chip removal during thread cutting.


5. Wood Screws:

 Wood Screws


Wood screws are partially threaded with large cutting threads and a smooth shank. They are designed to slip through the highest piece of wood and tightly pull all boards together.





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