The Pump,axial Pistons, cataloged under National Stock Number 4320-01-451-4157, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-451-4157 |
| Primary Part Number | 1642169 |
| Item Name | Pump,axial Pistons |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Discharge Connection Quantity | 1 |
| Pumping Element Type | PISTON |
| Intake Connection Type | THREADED INTERNAL |
| Pumping Element Operating Position | HORIZONTAL |
| Drive Shaft Length | 1.375 INCHES NOMINAL IN |
| Drive Connection Type | RIGID COUPLED |
| Reciprocating Stroke Type | VARIABLE |
| Operating Speed at Rated Capacity | 1800.0 REVOLUTIONS PER MINUTE |
| Pump Reciprocating Design | SINGLE ACTING |
| Control Location | LEFT SIDE |
| Discharge Connection Thread Size and Series/type Designator | 1.3125-12 UN |
| Drive Shaft Type | SPLINED, INVOLUTE EXTERNAL |
| Intake Connection Thread Size and Series/type Designator | 1.875-12 UN |
| Volume Control Type | PRESSURE COMPENSATION |
| Discharge Pressure | 700.0 COMPREHENSIVE PROCUREMENT GUIDELINE - CONSTRUCTION PRODUCTS - CEMENT AND CONCRETE CONTAINING SILICA FUME |
| Cylinder Quantity | 9 |
| Maximum Discharge Flow Rate | 21.0 GALLONS PER MINUTE |
| Discharge Connection Type | THREADED INTERNAL |
| Intake Connection Quantity | 1 |
| Media for Which Designed | HYDROCARBON FUELS AND OILS |
| Pump Rotation Direction | COUNTERCLOCKWISE |
| Mounting Type | FLANGE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| PVE21L-9-30-CVPC-12 | Motion Industries Div Columbus (USA) |
| 1642169 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| PVE21L-9-30-CVPC-12 | 5/9 Secondary reference Vickers Inc |
| 124-3610 | 5/9 Secondary reference Caterpillar Inc Div Caterpillar Defense |
NSN 4320-01-451-4157 is a Pump,axial Pistons, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-451-4157 has 2 manufacturer part numbers on file: PVE21L-9-30-CVPC-12 (Motion Industries Div Columbus), 1642169 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 1642169: Discharge Connection Quantity: 1; Pumping Element Type: PISTON; Intake Connection Type: THREADED INTERNAL; Pumping Element Operating Position: HORIZONTAL. 22 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.