1.1 This specification covers aluminum-alloy sand castings designated as shown in .1.2 This specification is not intended for aluminum-alloy sand castings used in aerospace applications.1.3 Alloy and temper designations are in accordance with ANSI H35.1 and H35.1M. Unified Numbering System alloy designations are in accordance with Practice E 527.1.4 Unless the order specifies the "M" specification designation, the material shall be furnished to the inch-pound units.