BS EN 4852:2019 Aerospace series. External spiral drive heads for threaded fasteners. Geometrical definition and fastener head wrenching configuration

Tensile strength
Acceptance (approval)
Titanium alloys
Bolts
External-thread fasteners
Fasteners
MJ threads
Approval testing
Threaded fasteners
Aircraft components

Link: BS EN 4852:2019 Aerospace series. External spiral drive heads for threaded fasteners. Geometrical definition and fastener head wrenching configuration
Source: BSI Standards