Yinpecly 304 Stainless Steel M20 Nylon Insert Lock Nuts - Hex Lock Nuts For Machinery, 5Pcs, Silver Tone

Need nuts that won't quit? Meet the Yinpecly Nylon Insert Hex Lock Nuts. These bad boys are made from 304 stainless steel with a sleek silver finish — no surface treatment needed. The M20 thread size with a 2.5mm pitch fits perfectly on heavy-duty bolts. Inside, there's a nylon collar that grips the threads tight, so they won't loosen up even under serious vibration. Perfect for machinery, shipbuilding, automotive work, or any project where safety matters. Each nut is 30mm across the hex, 20mm thick, and built to last. You get 5 pieces in the pack — enough to secure critical joints without breaking a sweat. Forget about lock washers or threadlocker; these nuts do the job clean and simple. Great for rebuilds, repairs, or custom fabrications. Tighten 'em once and they stay put!