... :M3-M56,UNC 6#-1-3/4",BSW 5/32"-2" spring lock washer standard/specialDetailed Product DescriptionFeatures:1)Standard: DIN127B,DIN7980 ... : M3-M56, UNC 6#-1-3/4",BSW 5/32"-2"3)Material: 70#,65Mn4)Surface: Black,Zinc Cr+3,Yellow ... ,H.D.G.Packing: bulk, box packing, polybag split spring lock washers DIN127B