This standard was last reviewed and confirmed in 2019. Therefore this version remains current.
ISO 12257:2008 specifies the dimensions of metric internal six-lobe drives used in metric screws in nominal thread diameter range 3 mm to 20 mm.
Status : PublishedPublication date : 2008-08
Edition : 1Number of pages : 2
Technical Committee:Aerospace fastener systems
Buy this standard
A standard is reviewed every 5 years
Revisions / Corrigenda