The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-01-499-4136, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Circor Naval Solutions Llc Dba Warren Pumps. Government technical data includes 6 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-499-4136 |
| Primary Part Number | 0657C1981S902A |
| Item Name | Impeller,pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Circor Naval Solutions Llc Dba Warren Pumps |
| Status | ACTIVE |
| Design Type | SINGLE WIDTH |
| Blade Quantity | 5 |
| Hub Quantity | 1 |
| Material | PLASTIC |
| Rotation Direction for Which Designed | CLOCKWISE |
| Blade Type | RADIAL TIP |
| 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 |
|---|---|
| 0657C1981S902A PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| Reference | Meaning |
|---|---|
| 0657C1981S901A | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
| 0657C1981 | D/9 Drawing number reference only Circor Naval Solutions Llc Dba Warren Pumps |
| PL-999F0902 FIND NO 23 | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
| 657C1981 | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
NSN 4320-01-499-4136 is a Impeller,pump,centrifugal, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-499-4136 has 1 manufacturer part number on file: 0657C1981S902A (Circor Naval Solutions Llc Dba Warren Pumps).
Key specifications for 0657C1981S902A: Design Type: SINGLE WIDTH; Overall Width: 5.750 INCHES NOMINAL IN; Blade Quantity: 5; Hub Quantity: 1. 6 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.