Round head hex socket screw

Phillips head screws are a type of screw that has a cross-shaped recess in the head. This recess allows the screw to be driven with a Phillips screwdriver, which is a type of screwdriver that has a cross-shaped tip. Phillips head screws are one of the most common types of screws used in the world, and they are used in a wide variety of applications, including furniture assembly, electronics assembly, and construction.

Headless hexagon socket head screws, also known as headless hexagon socket screws, stop screws, machine screws, positioning screws, etc., are screws without a screw head and have a hexagon socket groove on the screw rod.

Special screw 

Round head screws