Nylon 6/6 Pan Head Machine Screw, Black, #1 Phillips Drive, M3-0.5 Thread Size, 20 mm Length, Fully Threaded, USA Made (Pack of 100);

Machine screws are threaded fasteners that are typically used with nuts or drilled and tapped (threaded) holes. They are available with a variety of head shapes, which determine how the screw interacts with the mating surface, and drive styles, which determine the type of driver required to install and remove the screw.