| Owner: | Williamette Industries Incorporated |
| Type: | Box Car |
| AAR Class: | XM: Box car for general service equipped with side or side and end doors. |
| AAR Type: | B406 |
| Detail Info: | Unequipped Box Car, Inside Length: 49' to 59', cushion draft gear/underframe, Sliding doors, inside width less than 9ft 6in, Door opening 13ft to 15ft |
| Plate: | B |
| Max Gross Weight: | 220000 |
| Load Limit: | 156000 |
| Dry Capacity: | 4941 |
| Ext L/W/H: | 58' 1" / 10' 7" / 14' 11" |
| Int L/W/H: | 50' 6" / 9' 4" / 11' 0" |
