Brass is an alloy of primarily copper and zinc.Brass is highly corrosion resistant and electrically conductive. Our brass machine screw was manufactured according to ANSI,DIN,BS,JIS,etc. Head style:Flat,oval,Round,Pan,Fillister,Combination drive,Truss,Cheese,etc. diameter:#0-3/4" length:1/8"-6" Packing:polybag and carton Sending sample free of charge.