DIN 65434
DIN 65434 Aerospace series - Sleeves - Wall thickness 0.5 mm, for fasteners with reduced countersunk head; Text in German and English
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/2017
standard by Deutsches Institut Fur Normung E.V. (German National Standard), 03/01/2017