Washer Type: Spring Lock Washers Material: Zinc-plated Carbon Steel Quantity: 300 pieces 100% Brand New 5 Sizes: M3 M4 M5 M6 M8 1. Durable and Convenient Packaging: Our 300-piece black, zinc-plated set comes in a sturdy plastic case with size labels; each size is individually packaged in a clear airtight bag to prevent mixing during shipping. The plastic case is also reusable for storage. 2. High-Quality Material: Made of carbon steel, our split ring lock washers are black-plated to prevent rust and ensure long-lasting use. They feature high strength, high tensile strength, and excellent corrosion resistance, heat resistance, and low-temperature strength. 3. Versatile Use: These split ring lock washers are designed to prevent nuts, bolts, and screws from vibrating loose. By splitting and bending, they create a spring-like effect that adds extra tension to the fastener and material, resulting in rotational resistance. Suitable for various applications such as DIY home projects, auto repairs, shop use, and more. 4. Wide Size Range: Our lock washer set includes 5 sizes – M3, M4, M5, M6, and M8, with 60 pieces of each size. This assortment ensures you have the right size for your stationary or project work. Note that spring-loaded circular split washers are smaller in size and should be purchased separately if needed. 5. Reliable and Portable: With its high-quality construction and compact design, our set is both reliable and easy to carry. The transparent case with compartments allows for convenient portability and storage, keeping all the small lock washers organized and readily accessible. Package Includes: 300 pcs Spring Lock Washers