About profacts: Titanium screws fasteners Titanium and Titanium alloy specifications: 1)Common Ground a, Bolt sizes:M2-M22*length b, Nut sizes:M2-M22 c,gasket sizes:M2~M22 d, Standard:GB,DIN,ASME,BSW,UNC,JIS e, GRADE:Gr1,Gr2,Gr3,Gr5,Gr7,Gr9,Gr12,Gr23 2)Difference: a, Titanium for the..