| Item | Part No. | Part Name | Qty | Serial No. |
| 421-64-15501 | VALVE ASSEMBLY, STOP | A50001-- | ||
| 1 | (NSS) | BODY | A50001-- | |
| 2 | (NSS) | SPOOL | A50001-- | |
| 3 | 421-64-15530 | POPPET | A50001-- | |
| 4 | 421-64-15540 | SPRING | A50001-- | |
| 5 | 421-64-15550 | O-RING | A50001-- | |
| 6 | 421-64-15560 | END, SPOOL | A50001-- | |
| 7 | 421-64-15570 | SPRING | A50001-- | |
| 8 | 421-64-15580 | O-RING | A50001-- | |
| 9 | 421-64-15590 | PLUG | A50001-- | |
| 10 | 421-64-15910 | BOOT | A50001-- | |
| 11 | 421-64-15920 | SEAL | A50001-- | |
| 12 | 421-64-15930 | WIPER | A50001-- | |
| 13 | 421-64-15940 | COVER | A50001-- | |
| 14 | 421-64-15950 | BOLT, SOCKET | A50001-- |