A flat head cap screw is designed to securely fasten two host material plates together. This industrial fastener is meant to be inserted into a countersunk hole, ensuring that it does not leave any protrusion on the surface of the host material. Although it's often colloquially referred to as a bolt, the cap screw is characterized by its external threading that extends either partially up the stem or along the entire length of the bolt.

Flat head cap screws are offered in various materials, including stainless steel, steel, or aluminum, providing flexibility to match the specific requirements of your project. You can also choose surface finishes that complement the host material's appearance, especially when visual appeal is a crucial factor. These screws are measured from the top of the head to the bottom of the stem, distinguishing them from other cap screws, which are typically measured from beneath the head. Flat head cap screws are available in both inch and metric sizes to accommodate different applications and preferences.