This standard specifies the characteristics and qualification requirements for six lobe recesses defined by
EN 3911 for bolts. The requirements of this specification are additional to the requirements of the relevant bolt
technical specification.
DIN EN 3905:2008 Referenced Document
EN 3911 Aerospace series - Six lobe recess - Geometrical definition*, 2024-04-19 Update
ISO 5855-2 Aerospace - MJ threads - Part 2: Limit dimensions for bolts and nuts
DIN EN 3905:2008 history
2008DIN EN 3905:2008-12 Aerospace series - Six lobe recesses for bolts - Technical specification; German and English version EN 3905:2008
2008DIN EN 3905:2008 Aerospace series - Six lobe recesses for bolts - Technical specification; German and English version EN 3905:2008