This European Standard specifies the characteristics of laminated washers, in corrosion resisting steel, for maximum operating temperature 120 °C, for aerospace applications.
EN 3903:2017 Referenced Document
EN 2424:2008 Aerospace series - Marking of aerospace products
EN 9100:2009 Quality Management Systems - Requirements for Aviation, Space and Defense Organizations
EN 3903:2017 history
2017EN 3903:2017 Aerospace series - Washers@ laminated@ in corrosion resisting steel