Socket head bolt 1.DIN 912 2.Size;M6-M36 3.Material:middle carbon steel,alloy steel,stainless steel 4.Finish:plain,black,z.p Socket head bolt1.DIN 9122.Size;M6-M363.Material:middle carbon steel,alloy steel,stainless steel4.Finish:plain,black,z.pYour detail inquiry is highly appreciated.Thanks. Socket head bolt