"This specification covers established inch/pound manufacturing tolerances applicable to aluminum apply rolled or cold-finished bar@ rod@ wire@ and forging stock ordered to inch/pound dimensions. These tolerances apply to all conditions@ unless otherwise noted. The term ""excl"" applies only to the higher figure of the specified range. The general temper designation ""-TX51"" is used for brevity and denotes the full temper designations -T351@ -T451@ -T651@ -T851@ and ?CT7351@ and ""X"" representing one or more digits preceding the ""51""."