Self-clinching studs and pins are used to create a male thread or plain shaft on a sheet metal surface. They have special teeth and a groove under the head, which is pressed into a sheet metal punched hole using an anvil tool. The sheet metal material flows evenly into the teeth around the groove creating a strong connection, providing good torque and pull out forces. Self-clinch studs and pins are commonly used in the sheet metal industry, providing great convenience and reducing the cost of installation.