The Pump Unit,centrifugal, cataloged under National Stock Number 4320-00-437-7948, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Circor Naval Solutions Llc Dba Warren Pumps. Government technical data includes 26 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-437-7948 |
| Primary Part Number | R553X81558 |
| Item Name | Pump Unit,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Circor Naval Solutions Llc Dba Warren Pumps |
| Status | ACTIVE |
| Discharge Connection Quantity | 1 |
| Phase | THREE |
| Intake Connection Type | ROUND FLANGE |
| Frequency in Hertz | 60.0 |
| Inclosure Type | FULLY INCLOSED |
| Current Type | AC |
| Pumping Element Operating Position | VERTICAL |
| Centrifugal Pump Impeller Quantity | 1 |
| Voltage in Volts | 440.0 |
| Cooling Method | SELF VENTILATED |
| Prime Mover Quantity | 1 |
| Centrifugal Pump Impeller Suction Type | SINGLE |
| Operating Speed at Rated Capacity | 3500.0 REVOLUTIONS PER MINUTE |
| Pump Quantity | 1 |
| Features Provided | SELF-PRIMING |
| Prime Mover Cooling Medium | AIR |
| Stage Quantity | 1 |
| Environmental Protection | SPLASHTIGHT |
| Maximum Discharge Flow Rate | 15.0 GALLONS PER MINUTE |
| Discharge Connection Type | ROUND FLANGE |
| Intake Connection Quantity | 1 |
| Prime Mover Type | ELECTRIC MOTOR |
| Media for Which Designed | WATER, FRESH |
| Centrifugal Pump Design | RADIAL FLOW |
| Total Head | 96.000 FEET FT |
| Current Rating in Amps | 4.5 |
| 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 |
|---|---|
| R553X81558 PRIMARY | Circor Naval Solutions Llc Dba Warren Pumps (USA) |
| Reference | Meaning |
|---|---|
| R553 | 5/9 Secondary reference Circor Naval Solutions Llc Dba Warren Pumps |
| MILP18472 | 4/1 Identification reference U.S. Government activity |
NSN 4320-00-437-7948 is a Pump Unit,centrifugal, manufactured by Circor Naval Solutions Llc Dba Warren Pumps, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-437-7948 has 1 manufacturer part number on file: R553X81558 (Circor Naval Solutions Llc Dba Warren Pumps).
7 possible matches (shared part number, not a government interchangeability claim): 4320-00-486-8482, 4320-00-494-9732, 4320-00-998-4790. Verify interchangeability with system specifications before substitution.
Key specifications for R553X81558: Discharge Connection Quantity: 1; Phase: THREE; Intake Connection Type: ROUND FLANGE; Frequency in Hertz: 60.0. 26 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.