| Owner: | Union Pacific Railroad Company |
| Type: | Flat Car |
| AAR Class: | FMS: Specialty Ordinary flat car for general service. This car has flooring laid over sills and without sides or ends. |
| AAR Type: | F323 |
| Detail Info: | Flat Car, Load Limit: 185,000-199,999lb, Equipped with cushioned draft gear/underframe, Inside length: 60-75ft |
| Plate: | B |
| Max Gross Weight: | 263000 |
| Load Limit: | 189200 |
| Ext L/W/H: | 66' 4" / 10' 4" / 5' 9" |
| Int L/W/H: | 62' 0" / 9' 4" / 0' 0" |
