GB/T 898-1988

Double end studs b1=1.25d-type A

GB/T 898-1988

Double end studs b1=1.25d-type B

GB/T 9125-2010

Fasteners for pipe flange joints—Double end studs—Commodity fastener

GB/T 9125-2010

Fasteners for pipe flange joints—Double end studs—Special fastener

GB/T 9125-2010

Fasteners for pipe flange joints—Double end studs—Commodity fastener L≤2b

GB/T 9125-2010

Fasteners for pipe flange joints—Double end studs—Special fastener L≤2b

GB/T 901-1988

Double end studs (clamping type)

GB/T 901-1988

Double end studs (clamping type)—L≤2b Non full thread

GB/T 897-1988

Double end studs—b1=1d—Type A

GB/T 897-1988

Double end studs—b1=1d—Type B

GB/T 899-1988

Double end studs b1=1.5d—Type A

GB/T 899-1988

Double end studs —b1=1.5d(Type B)

GB/T 900-1988

Double end studs b1=2d—Type A

GB/T 900-1988

Double end studs b1=2d—Type B

GB/T 953-1988

Double end studs (clamping type)—Standard type

GB/T 953-1988

Double end studs(clamping type) -Elongated type

GB/T 33943-2017

Structural studs

GB/T 13807.2-1-2008

Type L Double end studs-Table 1

GB/T 13807.2-1-2008

Type S Double end studs(d≤56mm)-Table 1

GB/T 13807.2-1-2008

Type S Double end studs(d≥64mm)-Table 1