... is stainless steel screws, the head is the hexagon, the teeth are machine wire teeth, 1,Products DetailesMaterial1.Stainless Steel:SS201, SS303 ... DIN,JIS,ANSI,BSWManufacture ProcessHeading/washer assembly/Threading/Secondary machine/heat treatment/plating/Anti-slipping/Baking/QA/Package/ ... screw ,and then we can quote you the best price according our good quality,thank you! Hexagon machine screw