The Motor,hydraulic, cataloged under National Stock Number 4320-01-032-4678, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Hydra Service Llc. Government technical data includes 21 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-032-4678 |
| Primary Part Number | 53WK57004-4 |
| Item Name | Motor,hydraulic |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Hydra Service Llc |
| Status | ACTIVE |
| Spline Minor Diameter | 1.593 INCHES NOMINAL IN |
| Bolt Hole Thread Size | 0.375-16 |
| Displacement Type | VARIABLE |
| Connection Design | FLANGED AND THREADED |
| Spline Length | 1.437 INCHES NOMINAL IN |
| Connection Type | DRAIN AND INLET AND OUTLET |
| Spline Major Diameter | 2.000 INCHES NOMINAL IN |
| Thread Location | INTERNAL |
| Shaft Rotation Direction | CLOCKWISE |
| Thread Direction | RIGHT-HAND |
| Drive Shaft Type | SPLINED, STRAIGHT EXTERNAL |
| Spline Quantity | 24 |
| Bolt Hole Quantity | 8 |
| Operating Speed at Rated Capacity in RPM | 1300.0 OR 3000.0 |
| Bolt Circle Diameter | 0.375 INCHES NOMINAL IN |
| Thread Size | 0.437-20 AND 1.062-12 |
| Screw Thread Series Designator | UNF |
| Connection Government Spec/std | SAE J518A,SAE J514A |
| Material | IRON CAST HOUSING |
| Connection Quantity | 4 |
| Mounting Type | PAD |
| 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 |
|---|---|
| 53WK57004-1 | Eaton Aerospace, Llc Dba Jackson South (USA) |
| 53WK57004-2 | Eaton Aerospace, Llc Dba Jackson South (USA) |
| 53WK57004-4 PRIMARY | Hydra Service Llc (USA) |
| Reference | Meaning |
|---|---|
| 53WK57004-1 | 5/9 Secondary reference U.S. Government activity |
| 893902 | 3/9 Design control — primary reference Dynapower Company Llc |
| 53WK57004-2 | 5/9 Secondary reference U.S. Government activity |
| 53WK57004-4 | 5/9 Secondary reference U.S. Government activity |
NSN 4320-01-032-4678 is a Motor,hydraulic, manufactured by Hydra Service Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-032-4678 has 3 manufacturer part numbers on file: 53WK57004-1 (Eaton Aerospace, Llc Dba Jackson South), 53WK57004-2 (Eaton Aerospace, Llc Dba Jackson South), 53WK57004-4 (Hydra Service Llc).
Key specifications for 53WK57004-4: Spline Minor Diameter: 1.593 INCHES NOMINAL IN; Bolt Hole Thread Size: 0.375-16; Displacement Type: VARIABLE; Connection Design: FLANGED AND THREADED. 21 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.