... steel screws, the head is the hexagon, the teeth are machine wire teeth, 1,Products DetailesMaterial1.Stainless Steel:SS201, SS303, SS304 ... Relieving.StandardISO,GB,DIN,JIS,ANSI,BSWManufacture ProcessHeading/washer assembly/Threading/Secondary machine/heat treatment/plating/Anti-slipping/Baking/QA/Package/ShippingSample ...