... 3.zinc-plated,black,HDG Round head bolt DIN6031.Features of Round head bolt DIN603: ItemRound head bolt DIN603Material Carbon steel(,Q235,C1010,C1020, ... bags+chipboard carton(20x20x15cm)*Advantages of us for Round head bolt DIN603:*Leading time:within 7-15days based on the ... ,inspection report for the carriage bolt can be shown to you*Samples for Round head bolt DIN603 are partially in free2.Pictures ...