300 Pcs M3 M4 M5 Lock Nuts Kit, 304 Stainless Steel Hardware Nuts

Key features

• 300 Pcs All-in-One Value: M3x0.5, M4x0.7 and M5x0.8 lock nuts, 100 pcs each. Buying the three sizes separately costs nearly three times as much - one box covers the most common metric sizes for electronics, RC cars and 3D printers.
• Premium 304 (A2-70) Stainless Steel: 18% chromium and 8% nickel resists rust and corrosion in humid or outdoor conditions. The line passed ISO45001 standards, and the polished surface with clear threads never scratches your hands or workpieces.
• Reliable Anti-Loosening: The bonded nylon collar compresses against the bolt threads when tightened, creating elastic friction that keeps joints secure under vibration and temperature changes - ideal for RC cars, drones, appliances and machinery.
• Reusable 3-5 Times: Unlike single-use mechanical lock nuts, these nylon insert lock nuts can be removed and reused 3-5 times while keeping good locking performance, so maintenance and repairs are more convenient and cost less over time.
• Sealed Labeled Storage Box: All 300 nuts come in a sealed plastic case with quantity labels printed inside, so nothing gets lost or mixed up. The seal keeps out moisture and dust. Use torque or socket wrenches and never over-torque for best results.

Free shipping included. 30-day hassle-free returns.