First grade quality. Alloy steel. 12.9 grade . High strength. Had been exported to many countires. The most professional supplier for track bolt . Length: 1"-20"Dia:1/8"-1 1/2"Grade: 5 & 8 Material: 45Cr, 35GrMo,42GrMo Standard: ANSI, DIN, BS, AS, etc. We have thousands different part number ,such as :175-71-11454,175-71-11463,154-70-11141,154-70-11150,155-27-12181,154-27-12320,178-27-11150,195- ...