The Pump Unit,hydraulic, cataloged under National Stock Number 4320-01-559-4574, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Saab Aktiebolag. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-559-4574 |
| Primary Part Number | 6853 503-437 |
| Item Name | Pump Unit,hydraulic |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Saab Aktiebolag |
| Status | ACTIVE |
| Voltage in Volts and Current Type | 12.0 DC |
| 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 |
|---|---|
| 6853 503-437 | Saab Aktiebolag (SWE) |
| M-3551-0240 | Bas Komponent I Nassjo Aktiebolag (SWE) |
| Reference | Meaning |
|---|---|
| 6853 503-437 | 5/9 Secondary reference Saab Ab,training and Simulation |
| M-3551-0240 | 3/2 Design control — primary reference U.S. Government activity |
| 500355110240 | 3/2 Design control — primary reference U.S. Government activity |
| 10125935 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| M-3551-0240 | 5/9 Secondary reference Bas Komponent Ab |
NSN 4320-01-559-4574 is a Pump Unit,hydraulic, manufactured by Saab Aktiebolag, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-559-4574 has 2 manufacturer part numbers on file: 6853 503-437 (Saab Aktiebolag), M-3551-0240 (Bas Komponent I Nassjo Aktiebolag).
Key specifications for 6853 503-437: Overall Height: 7.437 INCHES NOMINAL IN; Voltage in Volts and Current Type: 12.0 DC; Overall Length: 16.125 INCHES NOMINAL IN; Overall Width: 6.125 INCHES NOMINAL IN. 1 specification is 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.