Class 12 9 Bolts and High Tensile Grade yfs 012 9 Metric Allen Bolt
2021 11 27 nbsp 0183 32 The bolts are stronger and corrosion resistant The class 12 9 Hex Head Bolts are made from this material with 1220MPa minimum tensile strength So the Yfs 012 9 Bolt is quenched and tempered to get this kind of high tensile