The Head,hydraulic Motor-Pump, cataloged under National Stock Number 4320-01-431-7432, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is W S Darley & Co Div Darley Pump Division. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | Head,hydraulic Motor-Pump |
| FSC / FSG | 4320 — Power and Hand Pumps (FSG 43) |
| Manufacturers | W S Darley & Co Div Darley Pump Division (CAGE 5B337) |
| Parameter | Value |
|---|---|
| NSN | 4320-01-431-7432 |
| Primary Part Number | 2800509 |
| Item Name | Head,hydraulic Motor-Pump |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | W S Darley & Co Div Darley Pump Division |
| 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 |
|---|---|
| 2800509 PRIMARY | W S Darley & Co Div Darley Pump Division (USA) |
| Reference | Meaning |
|---|---|
| B229 | D/9 Drawing number reference only W S Darley & Co |
| A450-3 | 5/9 Secondary reference W S Darley & Co |
| 2800506 | 5/9 Secondary reference W S Darley & Co |
| 2800507 | 5/9 Secondary reference W S Darley & Co |
| B229 REP NO 67 | 5/9 Secondary reference W S Darley & Co |
NSN 4320-01-431-7432 is a Head,hydraulic Motor-Pump, manufactured by W S Darley & Co Div Darley Pump Division, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-431-7432 has 1 manufacturer part number on file: 2800509 (W S Darley & Co Div Darley Pump Division).
1 possible match (shared part number, not a government interchangeability claim): 5935-01-732-5947. 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.