... produce to your request bolts and nuts1) Material:SS304,SS316,copper, brass, bronze, carbon steel 2) Grade: 4.8,6.8,8 ... ,JIS AND ) and non-standard.GradeClass 4.8, Class 6.8, Class 8.8, Class 10.9, Class 12.9SurfaceBlack, White or Blueness ... lets know the Size, quantity, Material or Grade, surface, If it is special and Non-standard products, please supply the Drawing or ...