1).Material:carbon steel
2).Size:M3-M64
3).Grade:4.8,8.8 4).Finish: Zinc plating, Black, Cr3+, Cr6+, H. D. G.
3).Grade:4.8,8.8
4).Finish:
Zinc plating, Black, Cr3+, Cr6+, H. D. G.
5).Outer packing: In cartons, wooden cases, or according to customers' demands