Self-locking hexagon nut with ribbed flange Steel ZincFlake 1012475.140.150
Hexagon flange nuts DIN 6923 Steel Zinc flake Cr(VI+)free - ISO 10683 flZnnc 10 metric fine11597
Hexagon nut with serrated flange DIN ≈6923 Stainless steel A4 80 M853119.080.001