The Pump,rotary, cataloged under National Stock Number 4320-01-331-8742, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Concentric Rockford Inc. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Pump,rotary |
| FSC / FSG | 4320 — Power and Hand Pumps (FSG 43) |
| Manufacturers | Concentric Rockford Inc (CAGE 70763); Esi Acquisition Corporation Div Engineered Sales (CAGE 5G568) |
| Parameter | Value |
|---|---|
| NSN | 4320-01-331-8742 |
| Primary Part Number | 1050231 |
| Item Name | Pump,rotary |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Concentric Rockford 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 |
|---|---|
| 1050231 PRIMARY | Concentric Rockford Inc (USA) |
| 1050231 | Esi Acquisition Corporation Div Engineered Sales (USA) |
| Reference | Meaning |
|---|---|
| SW28347 | 5/2 Secondary reference U.S. Government activity |
| 1002295 | 5/9 Secondary reference Esi Acquisition Corporation Div Engineered Sales |
| 4320013318742 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 1002295 | 3/9 Design control — primary reference Concentric Rockford Inc |
| 102295 | 5/9 Secondary reference Concentric Rockford Inc |
NSN 4320-01-331-8742 is a Pump,rotary, manufactured by Concentric Rockford Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-331-8742 has 2 manufacturer part numbers on file: 1050231 (Concentric Rockford Inc), 1050231 (Esi Acquisition Corporation Div Engineered Sales).
1 possible match (shared part number, not a government interchangeability claim): 6150-01-518-3261. 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.