Spring washers for railway fastening systems: 1. Material:65Mn,60Si2Mn 2. ... . Main products:rail clip,screw spike,bolts,nuts,rail pad,washer,fish plate and insulator.WasherTypeflat washerspring washerlock washerMaterialQ235,35#,etc ... ,Dacromet,etc.Passivate,Zine-plated,Phosphate,etc.Antirust,etc. Flat washer Spring washer