12.9 Grade Bolts and Nuts for Sprocket and Segment Excavator and Bulldozer Spare Parts
1. Our Advantages
2. Structure and Main Dimensions
3. Quality Detection
Metallic Phase Diagram
Surface: tempered sorbite and little free ferrite Grade 2.
Inner: tempered sorbite and little free ferrite Grade 2.
4. Compatible Brands
5. Hot Sales