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
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