90.93 Standard confirmed Jul 9, 2019
ISO
ISO/TC 20/SC 4 Aerospace fastener systems
International Standard
49.030.20 Bolts, screws, studs
Published
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.
PUBLISHED
ISO 12257:2008
90.93
Standard confirmed
Jul 9, 2019