GB/T 898-1988
Double end studs b1=1.25d-type A
GB/T 898-1988
Double end studs b1=1.25d-type B
HG/T 20613-2009
Bolting for use with stral pipe falanges-Double end sutds
DIN 835-1995
Studes with a length of engagement equal to about 2d
DIN 938-1995
Studs with a length of engagement equal to about 1d
DIN 939-1995
Studs with a length of engagement equal to about 1.25d
DIN 940-1995
Studs with a length of engagement equal to about 2.5d
Q 124-1999
Double end studs b1=1.25d
Q 125-1999
Double end studs b1=1.25d
Q 129-1999
Double end studs b1=2d
Q 129B-1999
Double end studs b1=2d
DIN 835-1972
Studes with a length of engagement equal to about 2d
DIN 835-2010
Studes with a length of engagement equal to about 2d
DIN 938-1972
Studs with a length of engagement equal to about 1d
DIN 940-1983
Studs with a length of engagement equal to about 2.5d
Q 124-2012
Double end studs b1=1.25d
Q 125-2012
Double end studs b1=1.25d
Q 129-2012
Double end studs b1=2d
Q 129B-2012
Double end studs b1=2d
QC/T 871-2011
Double end studs b1=2d