... Tensile Socket Head cap screws 2.Quality: 12.9 2.Surface: Galvanized,Black oxide 3.Material:ML40Cr 4.CET:TS16949:2009 Hexagon Socket Head ... 's requirement(drawing and samples)Database: 1.Specificates: M2-M48;2.Length:3mm-300mm;3.DIN912,DIN916,DIN7991,ISO7380,DIN933,DIN931 ... ,ISO7379.Packing:Workshop:Laboratory:Exhibition:Training: High Tensile Socket Head cap screws