... after-sale service 4.free sample flat head stainless steel screw Material:stainless steel,copper,alloy steel,aluminumStandard:ISO,DIN,BS,JIN,ASTM ANSI BA ... ,hexsocket,six-lobe,square,triangle,slotted.Place of OriginGuangdong China(mainland)Brand NameJinriMaterialCarbon steel & stainless steelSizeAll frequently-used size, produce as your ...