... :M3--M20XLmm... Product Description1. Grade: GR1,Grade2,Grade5(Ti6AI4V)2. Standard: GB, DIN, IFI, UNC, JIS, BS, BSW, ISO3. ... ,Hex flange head ,Torx head ,Button head ,Cup head ,Flange head5.Surface Treatment: Polishing, Anodizing, Black oxide 6.Material: Titanium alloy ... home and abroad and development together. TermTitanium scew and titanium boltGradeGr1,Gr2,Gr3,Gr4,Gr5,Gr7,Gr9,Gr11,Gr12,SizeBolt ...