CSK (Countersunk): CSK screws have a conical head with a flat top surface that fits flush with the target material when fully driven. This design allows for a smooth and even finish, reducing the risk of snagging or protrusions.

Phillips Head: Phillips head screws have a cross-shaped indentation on the top of the head, designed to be used with Phillips screwdrivers. The Phillips drive system provides good torque transmission and is widely used in various industries.

Dome nuts feature a domed or rounded cap on one end, which covers the exposed end of a threaded stud or bolt. This design provides a finished appearance and helps prevent snagging or injury from sharp edges.