The Pump,rotary, cataloged under National Stock Number 4320-00-983-5145, 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. Government technical data includes 5 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 | 4320-00-983-5145 |
| Primary Part Number | 4H1990 |
| Item Name | Pump,rotary |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Discharge Connection Quantity | 1 |
| Rotary Pump Design | GEAR |
| Intake Connection Quantity | 1 |
| Media for Which Designed | HYDROCARBON FUELS AND OILS |
| 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 |
|---|---|
| 4H1990 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
NSN 4320-00-983-5145 is a Pump,rotary, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-983-5145 has 1 manufacturer part number on file: 4H1990 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 4H1990: Discharge Connection Quantity: 1; Special Features: CONSISTS OF TWO PUMPS W/A MAX DISCHARGE FLOW RATE OF 48-12GPM,DISCHARGE PRESSURE 82 PSI,TOTAL OPERATING SPEED AT RATED CAPACITY OF 1330 RPM; 1-1/8 IN. DIA OPENING FLANGED INLET CONNECTION; 1.7525 IN. DIA OPENING FLANGED OUTELED CONNECTION IN; Rotary Pump Design: GEAR; Intake Connection Quantity: 1. 5 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.