This kit has all of the sizes of bolts that I use for my projects and also comes with washers, nuts ,and spring washers. I recommend it for 3d printing projects as well.
280 Piece Grade 12.9 Alloy Steel M3 Hex Socket Cover Head Bolt Screw Nut Assortment Kit with Storage Box - Includes Lengths 4mm, 5mm, 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, and 25mm
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