Modelcraft shim washers packs of 20 modelcraft 98830 2 modelcraft shim washers 6 x 3 x 02mm pack of 20 are hardened and ground to size shim rings which are used instead of normal washers particularly in gear manufacturing as a spacer washer between gearwheels on axles and shafts modelcraft 98830 2 shim washer 6x3x02mm pk20