DIN EN 3843 : 2011 Title: Aerospace series - Nuts, bihexagonal, self-locking, with counterbore, in heat resisting steel, passivated - Classification: 1100 MPa (at ambient temperature) / 650 °C; German and English version EN 3843:2010 Year: 2011 Publisher: DIN Media GmbH Availability: Within 1-2 working days