A CSK Slotted Screw (Countersunk Slotted Screw) is a fastener with a flat, countersunk head and a single-slot drive, designed to sit flush with or below the surface of the material for a smooth finish. This makes it ideal for applications where appearance and alignment are critical. Made from materials such as stainless steel, carbon steel, or brass, these screws offer durability and corrosion resistance. ... They are commonly used in woodworking, furniture, electrical fixtures, and general-purpose assemblies. CSK slotted screws are easy to install or remove using a flat-head screwdriver, ensuring a straightforward and reliable fastening solution.