| Owner: | Union Pacific Railroad Company |
| Type: | Box Car |
| AAR Class: | XM: Box car for general service equipped with side or side and end doors. |
| AAR Type: | B457 |
| Detail Info: | Unequipped Box Car, Inside Length: 49' to 59', cushion draft gear/underframe, Combination doors, inside width 9ft 6in and over, Door opening 15ft and over |
| Plate: | B |
| UP Class: | BC-70-5 |
| User Notes: | ACF |
