The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-01-475-4056, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-01-475-4056 |
| Item Name | Impeller,pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Status | ACTIVE |
| Design Type | SINGLE WIDTH |
| Overall Diameter | 10.125 INCHES NOMINAL IN |
| Mounting Method | THREAD |
| Thread Diameter | 1.000 INCHES NOMINAL IN |
| Thread Direction | RIGHT-HAND |
| Material | STEEL CORROSION RESISTING |
| Thread Quantity | 12 PER INCH |
| 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 |
| Reference | Meaning |
|---|---|
| 643175 | 5/9 Secondary reference A W Chesterton Co Div Sealing Device Division |
| 643175 | 3/9 Design control — primary reference Blackmer System One, Inc. Div Blackmer System One, Inc. |
| 1697812PC2 | 5/9 Secondary reference A W Chesterton Co Div Sealing Device Division |
NSN 4320-01-475-4056 is a Impeller,pump,centrifugal, classified under FSC 4320, Power and Hand Pumps. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6850-01-666-9899. Verify interchangeability with system specifications before substitution.
Key specifications for 4320-01-475-4056: Design Type: SINGLE WIDTH; Overall Diameter: 10.125 INCHES NOMINAL IN; Mounting Method: THREAD; Thread Diameter: 1.000 INCHES NOMINAL IN. 9 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.