... Torx, Rice character type, One Way etc.MaterialCarbon steel, stainless steel, SS-304, SS-302, Aluminum, Brass, ... Bronze, medium carbon alloy steel etc.Surface TreatmentZn-plating, Ni-plating, Cr-plating ... series, Tapping machine Dongrong/EF. Other machines including Spring machine Jinju & 502S, Shaft machine Liqiang ,Auto ... screw ,machine screw ,stainless steel screw and fasteners