Hubs have studs pressed into them. They have a 5" x 5 1/2" bolt pattern. They are for use with original or reproduction 1940-48 style "slip-over" drums (21A-1125 or 21A-1125-F). The rear hub is keyed for use with a stock axle & includes a bearing race, seal & lock ring.
Drum mounts to front side of hub, used with our 21A- series brake drums.
The required bearing for this hub is # 68-1225.