Special washers are defined by their non-circular inside and/or outside shapes.  Boker’s manufactures a wide variety of common special washers including C washers, D washers, tab washers, conical washers, wave spring washers and notched washers.  Boker’s also manufactures unique custom special washers to your exact specifications from your prints.  Special washers can be manufactured in size up to 12” x 12” flat with thicknesses from .005″ to .190″.