... GR2,GR3,GR5,GR7,GR9,GR10 ect 2.administer standard: ASTM B-265 3. size: 150-600*35-110mm itemtitanium ... GR2 GR3 GR5 GR7 GR9 GR10Size:M2-M22 Standard;DIN ASTM AMS Description: SpecificationM2~ M22GradeGr1,Gr2,Gr3,Gr4,Gr5(Ti- ... Difference: a, Titanium bolt for the chemical aspects,PCBequipment,electrodes. b, Titanium alloy used in Bicycle,Motorcycles,Electric Vehicles,Medical,Aircarft,Weapons etc ...