This specification covers steel self-drilling and self-piercing tapping screws for the connection of cold-formed steel members manufactured in accordance with ASTM C645 and C955. This specification also covers test methods for determining performance requirements such as dimension, and total case depth; and physical properties such as hardness, ductility, torsional strength, drill drive performance, and self-drilling tapping screw drill capacity. ASTM C1513 is referenced in the AISI standards for cold-formed steel framing, which are available for free download at www.aisistandards.org.