This standard specifies the dimensions, tolerances and physical constants of extruded round aluminium alloy bars used in aerospace construction.
AECMA PREN 2134-1976 history
2000AECMA PREN 2134-2000 Aerospace Series Round bars, Extruded, in Aluminium Alloys Diameter 10 mm Less Than or Equal to D Less Than or Equal to 220 mm Dimensions Edition P 1; Supersedes Edition 1: December 1976