90.20 Standard under periodical review Jul 15, 2024
ISO
ISO/TC 20/SC 4 Aerospace fastener systems
International Standard
49.030.20 Bolts, screws, studs
ISO 12256:2002 specifies the dimensions of metric internal cruciform ribbed drives used in metric screws in the nominal thread diameter range of 3 mm to 20 mm.
PUBLISHED
ISO 12256:2002
90.20
Standard under periodical review
Jul 15, 2024
PUBLISHED
ISO 12256:2002/Cor 1:2009