
Aerospace series. Spiral drive recesses for threaded fasteners. Geometrical definition and technical requirements.
STANDARD published on 14.11.2019
Designation standards: BS EN 4609:2019
Publication date standards: 14.11.2019
The number of pages: 18
Approximate weight : 54 g (0.12 lbs)
Country: British technical standard
Category: Technical standards BS
ISBN: 978 0 539 04451 5 Status: Definitive