N12
SKF N 12 N SERIES BEARING LOCK NUT 2.36" ID x 3.1609" OD 2.844" DIA PKG OF 5 NOS
The 2904110 model is certified for safety in commercial and industrial environments.
SKF N12 right Hand Thread Bearing Retaining Lock Nut 18 Threads
What I like about Fieldpiece is how they innovate without gimmicks.