WARN LOCKING HUB ASSEMBLIES....BEST HUBS AVAILABLE
These are the External Style hub. Reference the extension (black area) on the left hand hub in the picture above.
This bolts between the locking hub knob and the wheel hub.
Internal style hubs do not have this part, and mount directly into the wheel hub assembly.
57-76 FORD AND GM 1/2 AND 3/4 TON