GB/T 898-1988
Double end studs b1=1.25d-type A
GB/T 897-1988
Double end studs—b1=1d—Type A
GB/T 899-1988
Double end studs b1=1.5d—Type A
GB/T 900-1988
Double end studs b1=2d—Type A
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
DIN 949-1-1995
Metric interference-fit thread studs ith a length of engagement equal to about 2d—Type A
DIN 949-2-1995
Metric interference-fit thread studs ith a length of engagement equal to about 2d—Type B
DIN 2509-1986
Double end studs
NB/T 47027-2012
Equal-length twin stud for pressure vessel flange -type A
DL/T 1236-2013
Double ends anchor bolt
GB/T 33943-2017
Structural studs
Q 121-1999
Double end studs b1=1.25d
Q 121B-1999
Double end studs b1=1.25d
Q 123-1999
Double end studs b1=1.25d
Q 129-1999
Double end studs b1=2d
JB/ZQ 4756-2006
Anchor studs
DIN 797-1970
Special Foundation bolts-Rough pole double head bolt with hole and cone end