1.The mechanical grade is 12.9 2.Case hardening HRC 38-42 3.Material is 40CR 4.Suitable:track link,track shoe,excavator part

1).The mechanical grade is 12.92).Case hardening HRC 38-423).Material is 40CR4).Suitable:track link,track shoe,excavator part

we supply various types of hardware track nuts and bolts with high quality .Good quality products and high service for customers.Our purpose is to meet  customers demands

track bolt and nut