The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-00-955-2071, 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 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-955-2071 |
| Primary Part Number | A533 |
| 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 | PLAIN |
| Keyway Depth | 0.094 INCHES NOMINAL IN |
| Hub Bore Diameter | 0.812 INCHES NOMINAL AND 0.812 INCHES NOMINAL IN |
| Hub Length | 0.500 INCHES NOMINAL AND 0.500 INCHES NOMINAL IN |
| Design Type | SINGLE WIDTH |
| Overall Diameter | 5.440 INCHES NOMINAL IN |
| Mounting Method | KEY |
| Keyway Quantity | 1 |
| Hub Projection Length Beyond Wheel Side | 0.675 INCHES NOMINAL AND 0.565 INCHES NOMINAL IN |
| Blade Quantity | 4 |
| Keyway Length | 1.062 INCHES NOMINAL IN |
| Hub Quantity | 2 |
| Hub Location | BACK SIDE AND FRONT SIDE |
| Keyway Width | 0.188 INCHES NOMINAL IN |
| Material | COPPER 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 |
|---|---|
| A533 PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
NSN 4320-00-955-2071 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 4320-00-955-2071 has 1 manufacturer part number on file: A533 (Circor Naval Solutions Llc Dba Warren Pumps).
1 possible match (shared part number, not a government interchangeability claim): 5130-01-394-7644. Verify interchangeability with system specifications before substitution.
Key specifications for A533: Keyway Type: PLAIN; Keyway Depth: 0.094 INCHES NOMINAL IN; Hub Bore Diameter: 0.812 INCHES NOMINAL AND 0.812 INCHES NOMINAL IN; Hub Length: 0.500 INCHES NOMINAL AND 0.500 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.