"This specification covers established metric manufacturing tolerances applicable to seamless and welded thin-walls aircraft tubing of nickel@ nickel alloys@ and cobalt alloys ordered to metric dimensions. These tolerances apply to all conditions and are based on individual measurements@ unless otherwise noted. The term ""excl"" is used to apply only to the higher figure of a specified range. These tables are based on logical metric values and preferred metric sizes. Throughout this specification the term ""metric"" is intended to refer to the SI system. "