The Impeller,pump,centrifugal, cataloged under National Stock Number 4320-01-021-4859, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Armstrong Pumps Inc. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Impeller,pump,centrifugal |
| FSC / FSG | 4320 — Power and Hand Pumps (FSG 43) |
| Manufacturers | Armstrong Pumps Inc (CAGE 52694) |
| Parameter | Value |
|---|---|
| NSN | 4320-01-021-4859 |
| Primary Part Number | 810120-010 |
| Item Name | Impeller,pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Armstrong Pumps Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 810120-010 PRIMARY | Armstrong Pumps Inc (USA) |
| Reference | Meaning |
|---|---|
| 81296-041 | 5/9 Secondary reference Armstrong Pumps Inc |
| 189132 | 5/9 Secondary reference Itt Bell and Gosset-Hydronics a Unit of Itt Fluid Handling Div |
| 118840 | 5/9 Secondary reference Itt Bell and Gosset-Hydronics a Unit of Itt Fluid Handling Div |
NSN 4320-01-021-4859 is a Impeller,pump,centrifugal, manufactured by Armstrong Pumps Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-021-4859 has 1 manufacturer part number on file: 810120-010 (Armstrong Pumps Inc).
4 possible matches (shared part number, not a government interchangeability claim): 5305-01-282-4010, 5930-01-421-8232, 5905-01-497-4591. Verify interchangeability with system specifications before substitution.
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.