GB/T 838-1988
Hexagon head screws with waisted shank
DIN 7964-1990
Hexagon head screws with waisted shank-K end
DIN 7964-1990
Hexagon head screws with waisted shank-Sp end
DIN 7964-1990
Hexagon head screws with waisted shank-K end
DIN 7964-1990
Hexagon head screws with waisted shank-Sp end
CNS 4702-1982
Hexagon head bolts with reduced body
CNS 4702-1982
Slotted hexagon head bolts with reduced body
GOST 10338-1980
Hexagon head screws with waisted shank