Modelcraft shim washers packs of 20 modelcraft 988100 3 modelcraft shim washers 16 x 10 x 03mm 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 988100 3 shim washer 16x10x03mm pk20