Hex bolts with washer 1,Products DetailesMaterial1.Stainless Steel: SS201, SS303, SS304, SS316, ... -plated,Sandblast and Anodize,Chromate, Polish,Electro Painting,Black Anodize,Plain,Chrome plated,Hot Deep Galvanize(H. D. G. ) etc ... Spheroidizing,Stress Relieving.StandardISO,GB,DIN,JIS,ANSI,BSWManufacture ProcessHeading/washer assembly/Threading/Secondary machine/heat treatment/plating/Anti-slipping/ ...