1600PCS Metric Screw Assortment M2 M3 M4 M5, 12.9 Grade Alloy Steel Metric Screw and Nut Assortment Kit, Hex Socket Head Cap

【Well-Made Metric Bolt and Nut Assortment】: 100% made of high-quality 12.9 alloy steel, high strength, superior rust resistance, and excellent oxidation resistance, perfect for any meteorological use. The metric screw assortment conforms to the standardized metric system; the average error is less than 0.01 mm.

【1600pcs 16 Standard Sizes】: Various M2, M3, M4, and M5 screws and bolts with locking and flat washers, 16 total sizes: M2 screws: bolt lengths: 4mm, 6mm, 10mm, 12mm; M3 screws: bolt lengths: 6mm, 8mm, 12mm, 16mm, 20mm; M4 screws: bolt lengths: 12mm, 16mm, 20mm, 25mm. 1600pcs in total, meeting all requirements. 4 custom hex keys for each size are provided in the kit to make the screws easier to use.

【Zinc-plated screw set [Upgrade]: All screws are pre-coated without the need for rust-preventative oil, featuring an upgraded black zinc plating that extends rust resistance and provides a cleaner, more polished look. It's an ideal choice for personal use or as a gift for family and friends. [Nice Storage Box]: The bolt and nut kit comes in a reinforced box with separate compartments and sturdy latches, keeping everything neat and organized for easy storage and access. For easy transport, transparent label sheets are affixed to the inner and outer lids, allowing you to quickly see which sizes you need to use and fill. 【Wide Applications】: This assortment of metric bolts can be widely used in all kinds of precision machinery, 3D printers, electronics, household appliances, toys, etc. We offer a 24-month warranty; please feel free to contact us if you have any problems or questions.