GB/T 32.3-2020
Hexagon bolts with wire holes on head-fine pitch thread
AN 174-1990
Hexagon bolts with wire holes on head and on shank
AN 175-1990
Hexagon bolts with wire holes on head and on shank
AN 176-1990
Hexagon bolts with wire holes on head and on shank
AN 177-1990
Hexagon bolts with wire holes on head and on shank
AN 185-1990
Hexagon bolts with wire holes on head and on shank