Metric Steel Nylon-Insert Locknuts—Class 8 for Falco Hubs
These nuts nuts will hold up to vibration, wear, and changes in temperature. These metric locknuts have a nylon insert that holds onto bolts without damaging their threads. They have fine-pitch threads, which are closer together than coarse-pitch threads and less likely to loosen from vibration. These locknuts are reusable but lose holding power with each use.