1. Budget-Friendly Packaging: Sizes available: M3 M4 M5 M6 M8 M10 M12. 200 serrated flange lock nuts are neatly packaged in a clear plastic storage box for easy organization and portability. 2. Premium Quality Material: A2-70 stainless steel nuts, conforming to standard specifications. Odorless, non-toxic, corrosion-resistant, wear-resistant, rust-free, and durable, making them perfect for outdoor use. 3. Professional Grade Flange Nuts: Hexagon nuts featuring flanges and locking teeth that comply with DIN 6923/ISO 4161. These enhanced hex nuts provide a larger contact area for optimal force distribution compared to standard hex nuts. 4. Key Features: The serrated flange guarantees secure locking. The serrations help minimize nut vibration and enhance the holding force. The flange design negates the need for washers, and the serrations prevent loosening under dynamic loads. 5. Usage Area: Suitable for use with all standard screws (metric thread) including hexagon screws, cylindrical screws, countersunk screws, pan head screws, and more.