Fafeicy 50pcs Pure Copper Cup Washers, Countersunk Assorted Screw Cup Washers Kit for Home, Decoration, General Repair(M4)

• Material: Screw washer is made of pure copper material, with good electrical conductivity, thermal conductivity and oxidation endurance, to ensure the service life and performance of the washer.
• Standard Concentricity Design: The countersunk head washer has a standard concentricity, which ensures the accurate alignment during installation and improves the assembly efficiency and stability.
• Smooth Appearance Treatment: The smooth of the copper flat head gasket is not only beautiful, but also reduces friction, easy installation and removal, while reducing wear.
• Bolt Design: The bearing shape of the bolt is larger, which increases the contact area, makes the locking force more uniform, and improves the fastness of the connection.
• Stronger Locking: Due to the large shape of the bolt, it can provide greater friction when locking, ensuring that the connecting parts will not be loosened due to vibration, improving the reliability of the connection.

Specification: Item Type: Countersunk Screw Washer Material: Pure Copper Model: Inner Diameter Approx.,Outer Diameter Approx., Thickness Approx., Counterbore Angle, Single Weight Approx.: M3: 3.1mm/0.1in, 7.9mm/0.3in, 2.05mm/0.1in, 90°, 0.52g/ 0.02 oz M4: 4.1mm/0.2in, 9.9mm/0.4in, 2.5mm/0.1in, 90°, 0.88g/ 0.03 oz M5: 5.1mm/0.2in, 11.9mm/0.5in, 3.2mm/0.1in, 90°, 1.63g/0.06 oz M6: 6.1mm/0.2in, 13.9mm/0.5in, 3.5mm/0.1in, 90°, 2.35g/0.08 oz Package List: 50 x Countersunk Washers