Features Precision Engineering Design: Standard concentricity ensures a perfect fit, providing reliability and stability in various applications Enhanced Locking Mechanism: The large bearing surface of the countersunk head gasket delivers a firmer lock, minimizing the risk of loosening over time Durable Pure Copper Material: Crafted from high-quality copper, these washers resist rot and oxidation, ensuring longevity and consistent performance Lightweight and Easy Installation: Small in size and easy to handle, these screw washers simplify installation, making your projects more efficient Versatile Compatibility: Suitable for a wide range of materials, these industrial supplies adapt seamlessly across multiple applications, enhancing their usability Features: 1、These screw washers have standard concentricity, smoothly exterior, concentric. 2、This screw washer is ly matched, and the bearing exterior of the bolt is large, and the lock is firmer. 3、The countersunk head screw gasket is made of pure copper, which is not easy to rot, , and oxidation. 4、These screw washers are small in size, light in weight and easy to install and use. 5、Can be installed on many different types of materials. Wide range of applications. Specification: Item Type: Countersunk Screw Washer Material: Pure Copper Model2.35 g / 0.1 oz Package List: 50 x Gasket Package List 50 x Gasket