... ISO3.Specification:Screw:M3-M24 Bolt: M4-M64*L6—300mm Nut: M2.5-M64 Washer: M2.5-M64----.Hexagon scoket ... screw(DIN7991) the diameter min M3-max M8-----.Hexagon socket button head screw(DIN7380) the diameter min M3-max ... machine screws with collar, ,Hexagon nuts with flange, Hexagon socket set screws, and any other according customer's drawwing Item ... like Thread size,Height of head,Depth of socket etc