Fabco 688C-0508003 or 688C0508003 is a flange lock nut with nylon and a 1/2-13 thread, meaning 1/2 inch diameter at 13 threads per inch. The nylon collar grips the bolt threads all the way around, so the nut resists loosening under vibration and can lock at any position on the thread. The collar also closes off the thread, which helps protect it from corrosion. Once the collar is worn or damaged the nut spins on freely and should be replaced. It is a genuine Fabco part from Pro Gear and Transmission. Call us to confirm proper fit for your application.
Features
Flange lock nut with nylon
1/2-13 thread, 1/2 inch diameter at 13 threads per inch
Nylon collar grips the threads to resist vibration loosening
Locks at any position on the thread
Genuine OEM Fabco part
