NATIONAL JWS165/340 Pump parts list
| Liners & Liner Packing | ||
| SIZES | LINER | LINER PACKING |
| 3” | MK-0240-30 | MK-1712064 |
| 3½” | MK-0240-34 | MK-1712064 |
| 4” | MK-0240-40 | MK-1712064 |
| 4½” | MK-0240-44 | MK-1712064 |
| Gaskets | |
| JWS165 | MK-2410031-429 |
| JWS340 | MK-1718265 |
| SERIES | KING – G2 | KING – G2 |
| SUCTION | DISCHARGE | |
| VALVE (Urethane Insert) | MK-1561575 | MK-1561575 |
| VALVE (Rubber Insert) | N/A | N/A |
| VALVE SEAT | MK-1561571 | MK-1561572 |
| VALVE SPRING | MK-1712211 | MK-1712206 |
| VALVE INSERT (Urethane) | MK-1561577 | MK-1561577 |
| VALVE INSERT (Red Thunder) | N/A | N/A |
| VALVE INSERT (Rubber) | N/A | N/A |
| VALVE SEAT PULLER HEAD | N/A | N/A |
| Piston Size | Red Thunder Bonded Pistons | Imperial Piston | Imperial Rubber Kits | Rubber Bonded | Long Life (Urethane) |
| 3” | N/A | MK-I30HK10 | MK-I30HK | N/A | N/A |
| 3½” | N/A | MK-I34HK10 | MK-I34HK | N/A | N/A |
| 4” | MK-RT-400 | MK-I40HK10 | MK-I40HB | MK-RB-400-10 | MK-LL-400-10 |
| 4½” | MK-RT-440 | MK-I44HK10 | MK-I44HB | MK-RB-440-10 | MK-LL-440-10 |
* ¼ Size are available upon request
| RODS | |||||
| PISTON ROD | SUB ROD | EXTENSION ROD | ROD CLAMP | PISTON ROD NUT | |
| ONE PIECE | MK-0238 | MK-16-0238 | MK-24-0238 | MK-7403224 | |
| TWO PIECE | MK-0238-A | MK-0238-B | MK-16-0238 | MK-24-0238 | MK-7403224 |