... /BS/ANSI standard.2.Material:Steel/Stainless steel/Brass/Copper3.Head Type:Pan,Truss,Cheese,C.S.K,Oval,Hexagon,Hexagon ... washer,Pan washer,Flange,Square,T head,etc.3.Drive of screw :Torx/6-Lobe Socket,Hex Socket ... ,Phillis,Pozi,Combi,Slot,etc.4.Diameter:M2-M12 Length:3-2005.Metric/Inch6.Surface Finish: Steel can do self colour ...