Need nuts that won't vibrate loose? These M3 x 0.5mm stainless steel lock nuts are just what you need! The pack includes 100 pieces, so you'll have plenty for your projects. Each nut is made from durable 304 stainless steel with a nylon insert that creates a tight, self-locking grip on the bolt threads. Once tightened, the nylon deforms slightly, adding friction and resistance to keep the nut securely in place — perfect for applications where vibration or movement might cause regular nuts to loosen. The hex shape makes them easy to install with a wrench, and they're great for machinery, electronics, automotive work, bicycles, sports equipment, and DIY projects. The fine workmanship ensures reliable performance and shock resistance. At M3 size with a 0.5mm pitch, they're compatible with standard M3 bolts. Keep your assemblies secure with these high-quality lock nuts!