The 18-8 stainless steel socket cap screw has a button head with a pin-in-head hex 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 button head is round with a low profile and short vertical sides, and is suitable for light duty applications. The pin-in-head hex drive has a hexagonal indentation with a center pin that resists tampering by requiring a special driver to tighten or loosen the screw.Socket cap screws are threaded fasteners that have a cap head with an internal socket drive for installing in areas with limited side clearance. These 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 tool required to install the screw.