Features: Engineered with innovative hexagonal lock design, the flange nuts deliver superior resistance to loosening even under extreme mechanical stress, ideal for automotive and industrial equipment applications. Crafted from lightweight aluminum, these nuts feature integrated washer to ensuring vibration proof in harsh environment. Perfect for enthusiasts, professional engineers, and outdoor adventurers requiring reliable fasteners for drones, action cameras, or high vibration machinery components. Stability in demanding scenario like marine engineering projects, motorcycle assemblies, or instrument installations where safety and durability is critical. These corrosion resistant nuts combine aerospace grade reliability with effortless hand tightening convenience for industrial and consumer applications. Specifications: Component:Metal Size:Approx.4.5mm/0.18inch Package Includes: 10Pcs Aluminum Lock Nuts note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.