... DIN standard material : CS , SS , IRON size as customers requirement Flat keyFlat keys can be divided into 3 kinds of ... ordinary flat keys, the orientation flat keys and slide flat keys .Key's role is the ... parts fixed together.Material : carbon steel , stainless steel 304/316 , iron.Diameter : M3 , M4 , M6 ,.....M30.Length : 20mm~120mmGrade ... or send us drawing and smaples. Flat Keys