The Pump,rotary, cataloged under National Stock Number 4320-01-238-0790, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Oshkosh Defense Llc. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-238-0790 |
| Primary Part Number | 22781FX1 |
| Item Name | Pump,rotary |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Oshkosh Defense Llc |
| Status | ACTIVE |
| Discharge Connection Quantity | 1 |
| Intake Connection Type | THREADED INTERNAL |
| Pumping Element Operating Position | HORIZONTAL |
| Drive Connection Type | GEAR |
| Control Location | CENTER |
| Drive Shaft Type | SPLINED, STRAIGHT EXTERNAL |
| Volume Control Type | ROTARY |
| Rotary Pump Design | VANE |
| Discharge Connection Type | THREADED INTERNAL |
| Intake Connection Quantity | 1 |
| Media for Which Designed | HYDROCARBON FUELS AND OILS |
| Pump Rotation Direction | CLOCKWISE |
| Mounting Type | BASE |
| Operation Method | POWERED |
| 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 |
|---|---|
| 22781FX1 PRIMARY | Oshkosh Defense Llc (USA) |
| Reference | Meaning |
|---|---|
| 22781FX1 | 5/9 Secondary reference Oshkosh Corp |
NSN 4320-01-238-0790 is a Pump,rotary, manufactured by Oshkosh Defense Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-238-0790 has 1 manufacturer part number on file: 22781FX1 (Oshkosh Defense Llc).
Key specifications for 22781FX1: Discharge Connection Quantity: 1; Intake Connection Type: THREADED INTERNAL; Pumping Element Operating Position: HORIZONTAL; Drive Connection Type: GEAR. 14 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.