DIN EN 4634 : 2011 Title: Aerospace series - Screws, 100° countersunk head, six lobe recess, short thread, in heat resisting steel FE-PA2601 (A286), passivated - Classification: 900 MPa (at ambient temperature) / 650 °C; German and English version EN 4634:2009 Year: 2011 Publisher: DIN Media GmbH Availability: Within 1-2 working days