The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-00-477-6020, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-477-6020 |
| Item Name | Impeller,pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Status | ACTIVE |
| Keyway Type | STRAIGHT |
| Hub Bore Diameter | 1.366 INCHES NOMINAL IN |
| Hub Length | 2.063 INCHES NOMINAL IN |
| Design Type | SINGLE WIDTH |
| Overall Diameter | 9.000 INCHES NOMINAL IN |
| Mounting Method | KEY AND THREAD |
| Thread Diameter | 0.375 INCHES NOMINAL IN |
| Keyway Quantity | 1 |
| Thread Direction | RIGHT-HAND |
| Hub Projection Length Beyond Wheel Side | 1.500 INCHES NOMINAL IN |
| Blade Quantity | 2 |
| Keyway Length | 2.063 INCHES NOMINAL IN |
| Hub Quantity | 1 |
| Hub Location | CENTERED |
| Keyway Width | 0.250 INCHES NOMINAL IN |
| Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Material | COPPER ALLOY |
| Thread Quantity | 16 PER INCH |
| Rotation Direction for Which Designed | CLOCKWISE |
| Blade Type | STRAIGHT |
| 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 |
|---|---|
| P11131-8-5-8 | C/1 Advisory reference — outside the item-of-supply concept Clow Corp Pump Div |
| P11131-862 | 3/9 Design control — primary reference Clow Corp Pump Div |
NSN 4320-00-477-6020 is a Impeller,pump,centrifugal, classified under FSC 4320, Power and Hand Pumps. Status: active.
Key specifications for 4320-00-477-6020: Keyway Type: STRAIGHT; Hub Bore Diameter: 1.366 INCHES NOMINAL IN; Hub Length: 2.063 INCHES NOMINAL IN; Design Type: SINGLE WIDTH. 20 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.