GOST 7795-1970
Hexagonal head guide neck bolts with hole on head
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 7811-1970
Hexagonal head guide neck bolts with hole on head
GOST 15589-1970
Hexagon bolts with wire holes on head
GOST 15590-1970
Hexagonal head guide neck bolts with hole on head
GOST 15591-1970
Hexagon bolts with wire holes on head