titanium bolts and nuts titanium machine screw 1.Titanium screw/nut/bolt 2.Gr1,Gr2,Gr3,Gr4,Gr5,Gr7,Gr9 3. ... Standard is DIN,GB titanium bolts and nutstitanium machine screw Titanium screw/nut/boltMaterial is Gr1,Gr2,Gr3,Gr4,Gr5,Gr7 ... ,Gr9Standard is DIN,GBA . different inches and centimeters standardsB . can ...