BS EN 3903:2017 pdf free.Aerospace series - Washers,laminated, in corrosion resisting steel. BS EN 3903 1 Scope This European Standard specifies the characteristics of laminated washers, in corrosion resisting steel, for maximum operating temperature 120。C, for aerospace applications.2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application....