METRIC Diameter: M3~M56 Finish: Zinc,Plain,HDG,BLACK Grade: 4,6,8 Material: Carbon Steel Specification: DIN 934 Thread: Coarse/Fine Technical Data: 点开连接 INCH Diameter: 3/16 ~ 2 Finish: Zinc,Plain,HDG,BLACK Grade: 2,5, Material: Carb...[more]