I did a lot of this type screws so I got a lot of trouble. If possible, I will do more if I replace it from a single one. This time it was slightly hesitated because the number of required numbers and the number of packages did not match delicately.
There is no problem with the accuracy of both the screw thread and the hexagonal hole. Of course, the strength is also high. It was satisfactory when considering the price though plating was slightly weak whether it hated hydrogen embrittlement due to chrome moly material.