METRIC Diameter: M3~M20 Finish: ZincPlainHDGBLACK Grade: 4.86.88.8 Material: Carbon Steel Specification: DIN 6923 Thread: Coarse/Fine Technical Data: 点开连接 INCH Diameter: 1/4 ~ 1 Finish: ZincPlainHDGBLACK Grade: 25 Material...[more]