A socket cap screw, also known as a socket head cap screw, socket screw or Allen socket bolt, is a type of cap screw with a cylindrical head and hexagonal drive hole. These are made from 18-8 Stainless Steel which is Resistance to corrosion – stainless steel does not rust or tarnish giving you a better look and lasts longer. Strength – stainless steel is strong and it will hold up in harsh corrosive environments and it will also hold up in place with very high or low temperatures. Value – stainless steel may cost a little bit more originally, but it has a lasting value. Stainless steel fasteners will last longer than other fasteners so you will have savings in the long term. Low maintenance – stainless steel is easy to keep up because it is resistant to scratches and corrosion and it is easy to clean.