The Pump Unit,axial Pistons, cataloged under National Stock Number 4320-01-281-4397, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4320-01-281-4397 |
| Primary Part Number | 5497143-1 |
| Item Name | Pump Unit,axial Pistons |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Discharge Connection Quantity | 1 |
| Pumping Element Type | PISTON |
| Pumping Element Operating Position | HORIZONTAL |
| Reciprocating Stroke Type | FIXED |
| Operating Speed at Rated Capacity | 2400.0 REVOLUTIONS PER MINUTE |
| Pump Quantity | 1 |
| Pump Reciprocating Design | DOUBLE ACTING |
| Discharge Connection Thread Size and Series/type Designator | 1.625-12 UN |
| Discharge Pressure | 600.0 COMPREHENSIVE PROCUREMENT GUIDELINE - CONSTRUCTION PRODUCTS - CEMENT AND CONCRETE CONTAINING SILICA FUME |
| Cylinder Quantity | 1 |
| Discharge Connection Type | THREADED INTERNAL |
| Operation Relationship Design | SIMULTANEOUS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5497143-1 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| F3-MF820-U-10 | 5/9 Secondary reference Vickers Inc |
| 5497143 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 4320-01-281-4397 is a Pump Unit,axial Pistons, manufactured by Naval Sea Systems Command, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-281-4397 has 1 manufacturer part number on file: 5497143-1 (Naval Sea Systems Command).
Key specifications for 5497143-1: Discharge Connection Quantity: 1; Pumping Element Type: PISTON; Pumping Element Operating Position: HORIZONTAL; Reciprocating Stroke Type: FIXED. 12 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.
NSN 4320-01-281-4397 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.