This procurement specification covers aircraft quality studs made from a low alloy, heat resistant steel of the type identified under the Unified Numbering System as UNS K14675.AS 7458 135 000 psi ultimate tensile strength at room temperatureAS 7458-1 135 000 psi ultimate tensile strength at room temperature, nickel-cadium plated.>Primarily for aerospace propulsion system applications where good strength temperatures up to approximately 900 mDF is required and the part is protected against corrosion.