Track roller bolt
1-we own factory to manufacture
2-ISO certificaton
3-good quality track roller bolt

4- Grade: 12.9

The mechanical grade is 12.9, case hardening HRC 38-42, Material is 40CR,

and the surface is treated with bluing, screw thread has two type description,

one is the metric system:M12-M24-6g, another is denominator system:1/2"-1"/4--2A.

the specification can be customized.