DIN EN 3637 : 2009 Title: Aerospace series - Nuts, self-locking, bi-hexagonal (double reduced), in heat resisting nickel base alloy - NI-P101HT (Waspaloy), silver plated, Classification: 1 210 MPa/730 °C; German and English version EN 3637:2008 Year: 2009 Publisher: DIN Media GmbH Availability: Within 1-2 working days