The 18-8 stainless steel machine screw has a pan head with a drilled spanner drive and is made in USA. The 18-8 stainless steel material provides strength and offers good corrosion resistance in many environments. The material may be slightly magnetic. The drilled spanner drive, also called a snake eyes drive, has two holes opposite each other in the screw head to resist tampering by requiring a special driver to tighten or loosen the screw. The pan head has a flat top and short vertical sides with a rounded top edge.Machine screws are threaded fasteners that are typically used with nuts or drilled and tapped (threaded) holes. Machine screws 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.