FORD 1998-2004 F250 F350 SUPER DUTY DANA 50 / 60 OUTER AXLE STUB SHAFT

I'd Like to Know:

I would like to know what this is, what it goes to, what it was used for and who manufactured it. Thanks.

Item History: N/A.

Size: 10-1/2" in overall length, the shaft is 1-1/4" in diameter, the other larger rings are between 2-7/8" and 3" in diameter.

Markings: F47751M F7AX947