The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-01-426-2383, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Ampco Pumps Company Llc. Government technical data includes 8 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-426-2383 |
| Primary Part Number | B18202990 |
| Item Name | Impeller,pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Ampco Pumps Company Llc |
| Status | ACTIVE |
| Design Type | SINGLE WIDTH |
| Overall Diameter | 5.4375 INCHES NOMINAL IN |
| Mounting Method | THREAD |
| Blade Quantity | 5 |
| Hub Quantity | 2 |
| Hub Location | CENTERED |
| Material | COPPER ALLOY |
| Rotation Direction for Which Designed | COUNTERCLOCKWISE |
| 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 |
|---|---|
| B18202990 PRIMARY | Ampco Pumps Company Llc (USA) |
| Reference | Meaning |
|---|---|
| B18202990 | C/1 Advisory reference — outside the item-of-supply concept Ampco Metal Inc. Dba Ampco Metal Inc |
| B18202990 5-7/16IN. | 5/9 Secondary reference Ampco Pumps Company Llc |
| B18202990 FULL | C/1 Advisory reference — outside the item-of-supply concept Ampco Pumps Company Llc |
| BIB202990 | 5/9 Secondary reference Ampco Pumps Company Llc |
NSN 4320-01-426-2383 is a Impeller,pump,centrifugal, manufactured by Ampco Pumps Company Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-426-2383 has 1 manufacturer part number on file: B18202990 (Ampco Pumps Company Llc).
Key specifications for B18202990: Design Type: SINGLE WIDTH; Overall Diameter: 5.4375 INCHES NOMINAL IN; Mounting Method: THREAD; Blade Quantity: 5. 8 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.