316 stainless steel DIN912/GB70.1 hex socket hexagon socket screw M16-M20

1.Standard hexagon socket screw, standard parts, are not prone to slipping when locked

2.It is highly wear-resistant and corrosion-resistant, does not rust in a humid environment, and has strong anti-oxidation ability

3.316 stainless steel, beautiful and practical, with high hardness and no deformation

4.Helical thread, deep thread, uniform force distribution