Washers for M2, M3, and M4 Bolts

Simple washers for M2, M3, and M4 Bolts.  Each are 1 mm thick and can be easily scaled for thickness in your preferred slicer.  Although plastic washers are not as rigid or as strong as metal washers, they do perform well in cases where two 3D printed parts are being fastened together.  Great use for the last few grams of filament.