What Are The Specifications And Models Of High-strength Bolts?

The main specifications and models of high-strength bolts include: M8, M10, M12, M14, M16, and M18, etc. They are graded into three levels: 8.8, 10.9, and 12.9. For external thread nuts, the main models are M16x90, M16x95, M16x80, and M20x90, etc. For hexagonal bolts, the main models are M16x70 and M12x50, etc.