Feature: 1. SPECIFICATIONS: Including 215pcs hex lock nuts, with M3mm, M4mm, M5mm, M6mm, M8mm, M10mm, M12mm specifications, easy to use and replace. 2. MAIN PURPOSES: These hex lock nuts have good industrial strength, can replace lock washers, prevent bolt exposure, provide better safety and stability. 3. DURABLE MATERIALS: Made of premium stainless steel material for wear and corrosion resistance, with nylon inserts that are strong and crush resistant. 4. GOOD PERFORMANCE: With strong anti rotation ability to prevent the lock nut from weakening and loosening under vibration and torsion, thus reducing the clamping strength. 5. WIDE APPLICATION: Lock nuts ensure safe holding (reduces slippage) and long lasting hold of any item, commonly used in machinery, electronics and sports equipment etc. Specification: Item Type: Hex Lock Nut Material: Stainless Steel Color: Silver, Blue Specifications: M3mm, M4mm, M5mm, M6mm, M8mm, M10mm, M12mm Uses: Mainly used in machinery, electrical appliances, electronic computers, automobiles, sports equipment, etc. . Package List: 50 x M3mm Hex Lock Nut50 x M4mm Hex Lock Nut35 x M5mm Hex Lock Nut35 x M6mm Hex Lock Nut20 x M8mm Hex Lock Nut15 x M10mm Hex Lock Nut10 x M12mm Hex Lock Nut1 x Storage Box Note: Since the quantity is determined by the weighing of the precise instrument, please allow a numerical error of about 2%.