HG/T 20613-2009
Bolting for use with stral pipe falanges-Double end sutds
HG/T 20634-2009
All-thread studs for pipe flange
HG/T 21573.2-1995
Type BT double end studs with hole-Type I
HG/T 21573.2-1995
Type BT double end studs with hole-Type II
HG/T 21573.2-1995
Type BT double end studs-Type III
HG/T 21573.2-1995
Type BS double end studs with hole-Type I
HG/T 21573.2-1995
Type BS double end studs with hole-Type II
HG/T 21573.2-1995
Type BS double end studs-Type III