Flat socket cap screws, also known as flat head socket cap screws or flat socket head cap screws, are a type of fastener with a flat, countersunk head and a hexagonal recess (socket) for tightening with a hex key or Allen wrench. These screws are designed to be flush with the surface when properly installed, providing a smooth and low-profile appearance.

The flat socket cap screw’s key features include:

• Head Style: Flat socket cap screws have a flat head that is countersunk into the material it is fastened to. This design allows for a flush or nearly flush installation.
• Drive Type: They use a hexagonal recess (socket) for installation, typically requiring an Allen wrench or hex key. This drive type provides a more streamlined appearance compared to screws with external heads.
• Material: Flat socket cap screws are available in various materials, including stainless steel, alloy steel, and other metals, depending on the application requirements. The choice of material depends on factors such as corrosion resistance, strength, and environmental conditions.
• Thread Type: These screws feature machine screw threads, allowing them to be used with nuts or tapped holes.
• Common Applications: Flat socket cap screws are used in a variety of applications where a flush or low-profile fastener is desirable. Common applications include machinery, automotive, electronics, and other industries where aesthetics and functionality are important.
• Size and Length: They come in various sizes and lengths, allowing for versatility in different projects.

When using flat socket cap screws, it’s essential to choose the right size, material, and drive type for the specific application. Proper installation and torque are crucial to ensure a secure and reliable connection.