Specifications High-concerned chemical:None is_customized:Yes Model Number:NK1840 DIY Supplies:Electrical Brand Name:AuroraCharm Origin: China Item Type:Nut & Bolt Sets High Quality Materials: Button hex head cap screws are made of high quality 10.9 grade alloy steel, upgraded zinc electroplated version, The black oxide coating not only enhances their sleek appearance but also provides excellent corrosion resistance, ensuring long-lasting performance. Rest assured that these bolts and nuts will withstand the test of time and provide a secure connection. Standardized Metric Screw Set: Crafted with the utmost precision, each bolt and nut in this kit is accurately sized and labeled with metric measurements. Our set includes both flat washers and lock washers, offering you the flexibility to choose the level of security you need. The flat washers provide a stable surface for distributing the load evenly, while the lock washers offer an additional layer of protection against loosening. Thickened Storage Box: All of screws and nuts are packed in a durable and sturdy box to efficiently bear the weight of the whole package. In order to avoid the screws being scattered or lost during use, we specially package for each different type of screws for your convenience and storage, not only give you the best product, but also the best storage system for them. clear labels are pasted on both inner and outer lid, easy to storage and access. Wide Range Of Uses: M2 M3 M4 M5 Metric screw assortment kit serves a wide range of use. Such as precision machinery, classified instruments, instruments, electronic products, household appliances, communication products, locks, lamps, lights, toys, etc. and for professionals, landlords, repairmen, other diy. The set is perfect to replace broken and missing screws. Whether you are a professional or a DIY enthusiast, this hex socket bolts nuts washers kit is an essential addition to your toolbox.