WABCO part numbers starting 531
| 531044 | Haust valve e pin | WABCO | ||
| 531045 | Pilo valve assembly | WABCO | ||
| 531257 | Stud (valve, h-5 air) | WABCO | ||
| 531448 | Head | WABCO | ||
| 531491 | Line actuating cylinder assembly | WABCO | ||
| 531554 | Valve ring | WABCO | ||
| 531868 | O-ring (valve, independent brake) | WABCO | ||
| 531994 | Safety relief valve | WABCO |