... ,ASME,BSW,UNC,JIS d, GRADE:Gr1,Gr2,Gr3,Gr5,Gr7,Gr9,Gr12 2)Difference: a, Titanium for the chemical aspects,PCBequipment,electrodes ... include Titanium Torx Bolt,Titanium Flange Head Bolt,Titanium Countersunk Flat Head Screws, Titanium Hexagon Socket Head Knurled Screws,Titanium Nylon Lock Nut,Titanium Hex Nuts,Titanium ...