Nut, M10 Nylon Insert Lock

Exactly what I needed for my lathe—the nylon insert holds tight without damaging the threads. Installed in seconds and it hasn't budged under vibration.

Bought this to replace the original on my mill's Z-axis and the nylon insert makes all the difference—it's grippy enough to hold position but still spins on smooth with a wrench. The threading is clean, no burrs, and it seated perfectly first try. Just what I needed to stop the vibration loosening e

Finally, a lock nut that actually stays put under vibration without chewing up the threads. The nylon insert grips firmly but still lets me adjust by hand when needed.