WABCO part numbers starting 506
| 506276 | Felt (valve, no. 8 vent) | WABCO | ||
| 506400 | Ring | WABCO | ||
| 506463 | Spring (cylinder, brake) | WABCO | ||
| 506470 | Holder, push rod (cylinder, brake) | WABCO | ||
| 506499 | Piston (cylinder, brake) | WABCO | ||
| 506568 | Rods, push (cylinder, brake) | WABCO | ||
| 506630 | Sediment strainer element | WABCO | ||
| 506843 | Tee, pipe, 11/4 in (brake and bell piping) | WABCO | ||
| 506889 | Pin | WABCO |