Q 128-1999
Double end studs(clamping type)
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
QJ 2389-1992
Double end studs (clamping type)
JB/T 4707-2000
Type A double end studs
JG/T 5057.9-1995
Construction machinery and equipment-High strength fasteners
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 120-2012
Double end studs
QC/T 870-2011
Double end studs b1=1.25d
Q 124-2012
Double end studs b1=1.25d
Q 125-2012
Double end studs b1=1.25d
Q 126-2012
Double end studs
Q 128-2012
Double end studs(clamping type)
Q 129-2012
Double end studs b1=2d
Q 129B-2012
Double end studs b1=2d