... titanium fastener, titanium screws,titanium bolts, titanium nuts, etc. Jucheng titanium standards (especially titanium fasteners)Brand NameJuchengStandardASTM, JIS, DINMaterialGr1 , Gr2 , Gr3 , Gr4 , Gr5 , Gr6 , Gr7 , Gr9 , Gr11 , Gr12 ... include varies types of fasteners such as standard titanium fastener bolts, nuts, screws, etc. Such products are generally used in bicycle, ...