Gen V Strip-till Unit Complete Rear Hub. Comes in RH and LH configurations, the LH hubs have a "L" machined in end of stud. The LH has the reverse internal thread, RH is standard internal thread.
 
Key Features:
Used on GENV Row Units
Uses heavy duty tapered roller bearings
Dawn standard 6-bolt hole pattern
 
Specifications:
Doesn't come with mounting hardware
Bolt Thru Hole Diameter - .65 in
Bolt Circle Diameter - 5 in
Bolt Hole Diameter - .39 in 
Hub Pilot Diameter - 3.77 in
Pattern - 6 Bolt