... Cr+3, YZP, H.D.G.Fastener products domain:Bolt series: Hexagon head screws: DIN931, DIN933, DIN601, ISO4014, ISO4017 ... , ANSI/ASME B18.3.6M, ANSI/ASME B18.3.3MNut series: Hexagon Nuts, Hexagon thin Nuts, (DIN934, DIN935, DIN936 ... (DIN7995, DIN7996, DIN571), Drywall screws, (DIN18182), Washer series: Flat washer(DIN125, DIN6921, SO7089), Spring Washer, (DIN127), Hexagon socket set screws(DIN913, DIN914, ...