This nut has a smooth, clean surface and excellent workmanship.Rugged thread and high durability. Features: The surface is smooth and burr-free. Thread clean tooth phenomenon, not miss. Beautiful appearance, wide use. strong and high durability, well made. Specifications: Item type: nut material: stainless steel models for selection: M3, M-4, M5, M6, M-8, M-10, M12, M14, M-16, M18, M20 (optional) Weight of package: M3: 7g / 0.24oz M-4: 8g / 0.28oz M5: 15.5g / 0.54oz M6: 19.5g / 0.68oz M-8: 32g / 1, 12oz M-10: 61.5g / 2.16oz M12: 87.5g / 3.08oz M14: 120g / 4.23oz M-16: 155g / 5.46oz M18: 215g / 7.58 oz M20: 273.5g / 9.64oz Package size: 120 * 80 * 20mm / 4.72 * 3.14 * 0.78inches Package list: 5pcs * Nut