Flange Bearing Mounts fasten in place with four bolts (sold separately). The mounted bearings and components are held on the journal with shim spacers and a nylon insert lock nut supplied with each mount.
Stud Mounts are screwed into a user supplied threaded hole using the wrench flats on the stud mount flange. The mounted component is held on the journal with shim spacers and a supplied retainer ring.