... Screw and Fastener1.Grade: Gr1,Gr2,Gr3,Gr4,Gr5(Ti-6AL-4V),Gr7,Gr9,Gr12, etc.2.Standard: ... GB,DIN, IFI,UNC,UNC,JIS, BS,BSW ,ISO3.Specification:Screw:M3-M24 Bolt: ... diameter min M2-max M36-----Pan head machine screw with phillip(DIN7985) the diameter min M2-max ... -----.Hexagon socket button head screw(DIN7380) the diameter min M3-max M8-----Other non-standard: Cross recessed pan head ...