This nut has a smooth surface, neat thread and excellent workmanship.Rugged and high durability. Features: The surface is smooth and free of burrs. Thread neat, no missing tooth phenomenon. Beautiful appearance, wide use. Strong and high durability, well made. Specifications: Item type: Nut Material: Stainless Steel Selection models: M3, M-4, M5, M6, M-8, M-10, M12, M14, M-16, M18, M20(optional) Package weight: M3: 7g/0.24ounces M-4: 8g/0.28ounces M5: 15.5g/0.54ounces M6: 19.5g/0.68ounces M-8: 32g/1.12ounces M-10: 61.5g/2.16ounces M12: 87.5g/3.08ounces M14: 120g/4.23ounces M-16: 155g/5.46ounces M18: 215g/7.58ounces M20: 273.5g/9.64ounces Package size: 1208020mm/4.723.140.78inches Package list: 5pcs * Nut