South Bend Lathe Headstock Spindle with Extras

Description

Genuine South Bend headstock spindle with extra pieces.
All parts in great condition, all threads are great.
I’m not sure on the exact component identification, here is the part list:
1). Spacer with key
2). Thrust Bearing
3). Take-up nut
4). Headstock spindle
5). Headstock spindle flange? (Faceplate mount)?