GB/T 32.1-1988
Hexagon bolts with wire holes on head
QJ 2365-1992
Hexagon bolts with wire holes on head
Q 170B-1999
Hexagon bolts with wire holes on head
Q 171B-1999
Hexagon bolts with wire holes on head-fine pitch thread
Q 171C-1999
Hexagon bolts with wire holes on head-fine pitch thread
TB/T 1479-1991
Axle end bolt for rail vehicle axle- hexagon head with hole bolts for rough pole
Q 170B-2012
Hexagon bolts with wire holes on head
Q 171B-2012
Hexagon bolts with wire holes on head-fine pitch thread
Q 171C-2012
Hexagon bolts with wire holes on head-fine pitch thread
GOST 7798-1970
Hexagon bolts with wire holes on head
GOST 7805-1970
Hexagon bolts with wire holes on head
GOST 7808-1970
Hexagon bolts with wire holes on head
GOST 15589-1970
Hexagon bolts with wire holes on head
GOST 15591-1970
Hexagon bolts with wire holes on head
GB/T 32.1-2020
Hexagon bolts with wire holes on head
