Features: 1) Types: DIN 6923, JIS1190, GB6177, ANSI 2) Size: M3-M20,#10-3/4 3)Material: low/medium carbon steel Name: Flange hex nuts (DIN6923,JIS1190,GB6177)Size: M3-M20,#10-3/4 Material: Low Carbon Steel,Middle Carbon Steel Quality: Multi-station Cold Forging,Screw Thread 6H,Smooth Faced without Burrs Surface:Blue-White Zinc Plated/ Yellow ZP/ White ZP/ Self Color/ Black/ Nickle Plated/ HDG/ ...