Chromium-molybdenum steel without splicing one-piece molding, strong impact resistance, high hardness, good toughness
Inside the concave test four corners of the screw / nut interface: to meet the specifications of the complete tightening of the non-slip
High carbon steel material high temperature quenching: carbon black phosphating rust prevention
CR-MO chromium-molybdenum steel: the whole body is forged with chromium-molybdenum steel, molded and heat-treated for impact resistance.