Machine standard parts 1.Titanium screw/nut/bolt 2.Material is Gr1,Gr2,Gr3,Gr4,Gr5,Gr7,Gr9 3.Standard is DIN,GB High Quality ,Best Price , Machine standard parts A . different inches and centimeters standardsB . can develop according to your drawings or samplesC . titanium and titanium alloy supplied M4 standard parts