50Pcs Countersunk Screw Washer CNC Pure Copper Flat Head Gasket Industrial SuppliesM3

1、These screw washers have standard concentricity smoothly exterior concentric. 2、This screw washer is precisely 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 moisture 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.