UNE-EN 3902:2016 Aerospace series - Washers for rivet assemblies, in aluminium alloy, anodized, metric series (Endorsed by Asociación Española de Normalización in February of 2017.)
2017UNE-EN 3902:2016 Aerospace series - Washers for rivet assemblies, in aluminium alloy, anodized, metric series (Endorsed by Asociación Española de Normalización in February of 2017.)