The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-00-722-9031, 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 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-722-9031 |
| Primary Part Number | 1A390 |
| Item Name | Impeller,pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Circor Naval Solutions Llc Dba Warren Pumps |
| Status | ACTIVE |
| Keyway Type | RECTANGULAR |
| Keyway Depth | 0.130 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN |
| Hub Bore Diameter | 1.656 INCHES NOMINAL AND 1.625 INCHES MINIMUM AND 1.626 INCHES MAXIMUM IN |
| Hub Length | 2.000 INCHES NOMINAL IN |
| Design Type | SINGLE WIDTH |
| Overall Diameter | 13.250 INCHES NOMINAL IN |
| Mounting Method | KEY |
| Keyway Quantity | 1 |
| Hub Projection Length Beyond Wheel Side | 0.656 INCHES NOMINAL IN |
| Blade Quantity | 6 |
| Keyway Length | 2.000 INCHES NOMINAL IN |
| Hub Quantity | 1 |
| Hub Location | SINGLE INSIDE OFFSET |
| Keyway Width | 0.250 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Rotation Direction for Which Designed | CLOCKWISE |
| Blade Type | BACKWARD CURVE |
| 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 |
|---|---|
| 1A390 PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| Reference | Meaning |
|---|---|
| ND16550REVA | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
NSN 4320-00-722-9031 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 4320-00-722-9031 has 1 manufacturer part number on file: 1A390 (Circor Naval Solutions Llc Dba Warren Pumps).
Key specifications for 1A390: Keyway Type: RECTANGULAR; Keyway Depth: 0.130 INCHES MINIMUM AND 0.140 INCHES MAXIMUM IN; Hub Bore Diameter: 1.656 INCHES NOMINAL AND 1.625 INCHES MINIMUM AND 1.626 INCHES MAXIMUM IN; Hub Length: 2.000 INCHES NOMINAL IN. 17 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.