A button head cap screw is a type of fastener that consists of a cylindrical head with a rounded, low-profile top and a flat underside. The term “button head” comes from the fact that the head looks somewhat like a button. These screws are designed to provide a neat and finished appearance when installed.

Key features of button head cap screws:

• • Head Design: The head has a rounded top with a cylindrical shape, giving it a smooth and aesthetically pleasing appearance.
  • Drive Type: Button head cap screws typically have a socket drive, such as an Allen or hex drive. This means they require a corresponding tool (Allen wrench or hex key) for installation and removal.
  • Applications: They are commonly used in applications where a low-profile head is desired for a clean and finished look. These screws are often used in machinery, automotive, and electronic applications, among others.
  • Material: Like other types of screws, button head cap screws can be made from various materials, including stainless steel, steel, or other alloys, depending on the specific requirements of the application.

It’s important to choose the right size, material, and drive type for your specific application to ensure proper functionality and durability.