... Square Neck Bolt 1.Standard:DIN,GB,JIS,ANSI,Non-standard 2.Coating: plain,zinc,nickel, phosphate black 3Grade Features:1) ... Standard:DIN,GB,JIS,ANSI,Non-standard 2) Material: Carbon steel3) ... Dimension: According to your requirement 4) Coating: plain,zinc,nickel, phosphate ...