Keep your projects running smoothly with this comprehensive 1200-piece black nylon flat washer assortment kit. Covering a wide range of metric sizes — M2, M2.5, M3, M4, M5, M6, M8, M10, and M12 — this kit ensures you always have the right washer on hand for any task. Made from durable nylon material, these washers offer excellent electrical insulation, corrosion resistance, heat insulation, and non-magnetic properties, making them ideal for a variety of demanding applications. Use them to reduce friction, prevent leaks, isolate components, prevent loosening, or disperse pressure across surfaces. Their versatility makes them suitable for automotive repairs, mechanical assembly, household projects, electrical work, aviation, and much more. Each size is neatly organized in its own compartment within a custom storage box, so you can quickly identify and access the size you need without any hassle. Whether you are a DIY enthusiast or a professional, this washer kit is a must-have addition to your toolbox.