10Pcs Grade 12.9 Half Round Head Plating Titanium Gold Hex Screw M2 M2.5 M3 M4 M5 ISO7380 Hex Socket Screw Length 3-35mm Material:Alloy steel Product standardISO7380 Product strengthGrade 12.9 Surface treatment: Titanium plated Advantages: Rust prevention Product Size: diameter x Length / d x L e.g:M2x6mm means d iameter=2mm, Length =6mm Unit:mm Size A D H B M Tooth distan