8.8 120,000PSI HRC28-32
10.9 150,000PSI HRC32-36
12.9 170,000PSI HRC36-42
We are professional supplier of track bolts and nuts,mainly 10.9,12.9 grade track bolt with nuts in grade 10,also we can produce according to customer's drawing or sample.
If you want sample for test,please feel free to contact with us!