Gypsum board screws, also known as drywall screws, are specifically designed for use with drywall or gypsum board installations. They have several key characteristics that differentiate them from regular screws:

Thread Type: Gypsum board screws typically have a unique thread design. They are often referred to as "coarse" or "deep" threaded screws. The deep threads are essential for effectively gripping and securing the relatively soft and fragile gypsum board material.

Bugle Head: Gypsum board screws feature a bugle-shaped head. The head is wider and flatter compared to the heads of regular screws. This design helps to prevent the screw from breaking through the paper surface of the drywall while ensuring a flush finish.

Size and Length: Gypsum board screws are available in specific lengths to suit different drywall thicknesses. Common sizes include 1 1/4", 1 5/8", and 2". The size and length of the screws ensure that they securely penetrate the drywall without going too deep.

Material and Coating: Gypsum board screws are typically made from hardened steel to provide strength and durability. Some variations may have a black phosphate or gray phosphate coating, which helps to resist corrosion.

Self-Drilling Point: Many gypsum board screws come with a self-drilling point. This means they have a sharp tip that eliminates the need for pre-drilling pilot holes in the drywall, making the installation process faster and more convenient.

Fine Thread at the Tip: Some gypsum board screws have a fine-threaded section near the tip. This feature aids in starting the screw in the drywall, reducing the chances of damaging the board's paper surface during installation.

Overall, the key characteristics of gypsum board screws are designed to facilitate easy installation, prevent damage to the drywall, and provide a reliable and secure fastening method for gypsum board applications. Using regular screws in place of gypsum board screws can lead to improper installation, weaker hold, and potential damage to the drywall due to their different design and thread pattern.