The Connector,fluid,pump, cataloged under National Stock Number 4320-01-656-7790, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Connector,fluid,pump |
| FSC / FSG | 4320 — Power and Hand Pumps (FSG 43) |
| Manufacturers | Caterpillar Inc Div Caterpillar Defense (CAGE 11083); Curtiss-Wright Electro-Mechanical Corporation Div Epd (CAGE 0UBG9) |
| Parameter | Value |
|---|---|
| NSN | 4320-01-656-7790 |
| Primary Part Number | 449-5509 |
| Item Name | Connector,fluid,pump |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| 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 |
|---|---|
| 449-5509 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| 17924N18-99B | Curtiss-Wright Electro-Mechanical Corporation Div Epd (USA) |
| Reference | Meaning |
|---|---|
| PL-17924N18-99B | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corporation Div Epd |
| 17924N18 | D/9 Drawing number reference only Curtiss-Wright Electro-Mechanical Corporation Div Epd |
NSN 4320-01-656-7790 is a Connector,fluid,pump, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-656-7790 has 2 manufacturer part numbers on file: 449-5509 (Caterpillar Inc Div Caterpillar Defense), 17924N18-99B (Curtiss-Wright Electro-Mechanical Corporation Div Epd).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-656-7794, 4320-01-656-8374. 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.