The Pump,rotary, cataloged under National Stock Number 4320-01-239-5258, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic. Government technical data includes 6 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-239-5258 |
| Primary Part Number | PX4917A |
| Item Name | Pump,rotary |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic |
| Status | ACTIVE |
| Operating Speed at Rated Capacity | 2000.0 REVOLUTIONS PER MINUTE |
| Discharge Pressure | 00.0 ENERGY EFFICIENT - FEMP - LOW STANDBY POWER - OFFICE EQUIPMENT -INTEGRATED COMPUTERS |
| Maximum Discharge Flow Rate | 4.3 GALLONS PER MINUTE |
| Rotary Pump Design | GEAR |
| Media for Which Designed | OIL |
| Pump Rotation Direction | CLOCKWISE |
| 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 |
|---|---|
| PX4917A PRIMARY | Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic (USA) |
NSN 4320-01-239-5258 is a Pump,rotary, manufactured by Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-239-5258 has 1 manufacturer part number on file: PX4917A (Twin Disc, Incorporated Dba Twin Disc Mid-Atlantic).
Key specifications for PX4917A: Operating Speed at Rated Capacity: 2000.0 REVOLUTIONS PER MINUTE; Discharge Pressure: 00.0 ENERGY EFFICIENT - FEMP - LOW STANDBY POWER - OFFICE EQUIPMENT -INTEGRATED COMPUTERS; Maximum Discharge Flow Rate: 4.3 GALLONS PER MINUTE; Rotary Pump Design: GEAR. 6 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.