The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-01-221-2173, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 16 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4320-01-221-2173 |
| Item Name | Impeller,pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Status | ACTIVE |
| Keyway Type | RECTANGULAR |
| Keyway Depth | 0.136 INCHES NOMINAL IN |
| Hub Length | 1.343 INCHES NOMINAL AND 0.500 INCHES NOMINAL IN |
| Design Type | SINGLE WIDTH |
| Overall Diameter | 8.000 INCHES NOMINAL IN |
| Mounting Method | KEY |
| Keyway Quantity | 1 |
| Hub Projection Length Beyond Wheel Side | 1.343 INCHES NOMINAL AND 0.843 INCHES NOMINAL IN |
| Blade Quantity | 5 |
| Keyway Length | 1.687 INCHES NOMINAL IN |
| Hub Quantity | 2 |
| Hub Location | FRONT SIDE AND BACK SIDE |
| Keyway Width | 0.250 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Rotation Direction for Which Designed | COUNTERCLOCKWISE |
| 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 |
|---|---|
| NF12203-001 | D/9 Drawing number reference only U.S. Government activity |
| NF12203-001-1 8INCH GM | 3/2 Design control — primary reference U.S. Government activity |
| NG12253 | D/9 Drawing number reference only U.S. Government activity |
| NF12203-001 8 INCH DIA | 5/9 Secondary reference U.S. Government activity |
| NG12253 PC 3 | 5/2 Secondary reference U.S. Government activity |
NSN 4320-01-221-2173 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): 4320-01-253-6296. Verify interchangeability with system specifications before substitution.
Key specifications for 4320-01-221-2173: Keyway Type: RECTANGULAR; Keyway Depth: 0.136 INCHES NOMINAL IN; Hub Length: 1.343 INCHES NOMINAL AND 0.500 INCHES NOMINAL IN; Design Type: SINGLE WIDTH. 16 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.