... , Hex Socket, Torx, Rice character type, One Way etc.MaterialCarbon steel, stainless steel, SS-304, SS-302, Aluminum, Brass, Bronze, medium carbon ... , Self Drilling Screw etc.Producing EquipmentScrew machine Hexing/SX & H series, Tapping machine Dongrong/EF. Other machines including Spring machine Jinju ... ://gdsx.en.alibaba.com all kinds of screw ,machine screw ,stainless steel screw and fasteners