titanium nuts and bolts:DIN,ASTM,GB,BSW,UNC,JIS Technique:forging,rolled,CNC Machining Dimension:M3-M22 titanium nuts and bolts :Titanium and Titanium alloy specifications ... Standard:GB,DIN,ASME,BSW,UNC,JISd, GRADE:Gr1,Gr2,Gr3,Gr5,Gr7,Gr9,Gr12,Gr23 2)Difference:a, Titanium for the ... chemical aspects,PCB equipment,electrodes.b, Titanium ...