... 6923, JIS1190, GB6177, ANSI 2) Size: M3-M20,#10-3/4 3)Material: low/medium carbon steel Name: Flange hex nuts ... ,GB6177)Size: M3-M20,#10-3/4 Material: Low Carbon Steel,Middle Carbon Steel Quality: Multi-station Cold Forging,Screw Thread 6H,Smooth ...