AllFlex™ 302 stainless steel thread-cutting and self-tapping fasteners are made in the U.S.A., yet have a proven success record in architectural applications around the world. 300 series stainless steel offers long-term corrosion resistance in aggressive environments such as coastal areas. In order to prevent damage when joining dissimilar materials like aluminum, each AllFlex™ fastener is coated with Stalgard® GB (Galvanic Barrier) finish. Stalgard® GB provides far greater galvanic protection for aluminum components than plain finish 300 series stainless fasteners. AllFlex™ fasteners are the ideal fastening solution for curtain walls, windows, doors and other applications that include aluminum and/or are in a marine environment.