Hexagon bolt and nut DIN934 , ANSI B18.2.2 Stainless Steel M4~M20, Grade 4.8,6.8,8.8,10.9,12.9 Hexagon bolt and nut Standard: DIN934 , ANSI B18.2.2 , JIS B1181Material: Stainless Steel SUS 200, SUS304, SUS 316 SIZE: M4/M6/ M8/ M10/ M12/ M14/ M16/ M20Bolt Length: 20mm-200mmGrade:4.8, 6.8, 8.8, 10.9, 12.9.