... 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- ... EquipmentProjecting apparatus, Salt Spray Test, Durometer, and Coating Thickness Tester.WorkforceA group of experienced production ... ,machine screw ,stainless steel screw and fasteners