Q 120-1999
Double end studs
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 124-2012
Double end studs b1=1.25d
Q 125-2012
Double end studs b1=1.25d
Q 128-2012
Double end studs(clamping type)