I.S. EN 4609:2019
Current
The latest, up-to-date edition.
Aerospace series - Spiral drive recesses for threaded fasteners - Geometrical definition and technical requirements
Hardcopy , PDF
English
24-11-2019
For Harmonized Standards, check the EU site to confirm that the Standard is cited in the Official Journal.
Only cited Standards give presumption of conformance to New Approach Directives/Regulations.
European foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Required characteristics: configuration — dimensions — tolerances
5 Designation
6 Recess gauging
7 General technical requirements
8 Detail technical requirements
Bibliography
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