... resistance 4.pure titanium and titanium alloy Item Name Titanium washer Material Pure Titanium and Alloy Titanium Gradegr1,gr2,gr5(Ti ... -6AL-4V),etc.Standard GB,DIN, IFI,UNC,UNC,JIS, BS,BSW ,ISODIN125,912,913,914,915,916,931,933 ... ,7991,7984,6921,ISO 7380,JIS,BS etc.Specification Screw: M3--M64*L6—300mm (or as ...