Detail Specifications / Descriptions
According To：DIN 912-1983/ISO 4762-1997
Material：Alloy Steel SCM435、Stainless Steel304
Strength Grade：12.9; 10.9; 8.8（M3~M24）
Tensile Strength：120~140 kgf/mm2
Hardness：HRC 39~44
Surface Treatment：Black Oxide
Class of Thread： 5g6g