Mushroom Head Square Neck Bolt 1.Standard:DIN,GB,JIS,ANSI,Non-standard 2.Coating: ... ,zinc,nickel, phosphate black 5) Packing:Boxes or Bulk ,Cartons in Pallet ,According to customers' requirements6) Grade: 4.8,5.8 ... ,GR57) Payment:T/T,L/C 8) The type of bolt in picture is DIN603, SIZE: 1/4" DIN603 Mushroom Head Square ...