DIN EN 2809 : 2001 Title: Aerospace series - Nuts, hexagon, slotted/castellated, reduced height, normal across flats, in heat resisting steel, silver plated - Classification: 900 MPa (at ambient temperature)/650 °C; German version EN 2809:2001 Year: 2001 Publisher: DIN Media GmbH Availability: Within 1-2 working days