The Pump Unit,centrifugal, cataloged under National Stock Number 4320-01-321-9961, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is W.w. Grainger, Inc. Div Government Sales Division. Government technical data includes 29 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-321-9961 |
| Primary Part Number | 12U595 |
| Item Name | Pump Unit,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | W.w. Grainger, Inc. Div Government Sales Division |
| Status | ACTIVE |
| Discharge Connection Quantity | 1 |
| Phase | SINGLE |
| Intake Connection Type | THREADED EXTERNAL |
| Frequency in Hertz | 60.0 |
| Inclosure Type | FULLY INCLOSED |
| Current Type | AC |
| Prime Mover Power Rating | 0.01 HORSEPOWER |
| Unpackaged Unit Length | 4.500 INCHES NOMINAL IN |
| Centrifugal Pump Impeller Quantity | 1 |
| Voltage in Volts | 115.0 |
| Cooling Method | WATER-AIR COOLED |
| Prime Mover Quantity | 1 |
| Centrifugal Pump Impeller Suction Type | SINGLE |
| Pump Quantity | 1 |
| Unpackaged Unit Width | 5.0000 INCHES NOMINAL IN |
| Discharge Connection Thread Size and Series/type Designator | 0.250-18 NPT |
| Prime Mover Cooling Medium | AIR AND WATER, FRESH |
| Intake Connection Thread Size and Series/type Designator | 0.500-14 NPT |
| Unpackaged Unit Height | 5.000 INCHES NOMINAL IN |
| Stage Quantity | 1 |
| Environmental Protection | SUBMERSIBLE |
| Maximum Discharge Flow Rate | 3.3 GALLONS PER MINUTE |
| Discharge Connection Type | THREADED EXTERNAL |
| Intake Connection Quantity | 1 |
| Material | PLASTIC PUMP BASIC |
| Prime Mover Type | ELECTRIC MOTOR |
| Operation Relationship Design | SIMULTANEOUS |
| Centrifugal Pump Design | MIXED FLOW |
| Total Head | 5.000 FEET FT |
| 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 |
|---|---|
| 12U595 PRIMARY | W.w. Grainger, Inc. Div Government Sales Division (USA) |
| Reference | Meaning |
|---|---|
| 1P805A | 3/9 Design control — primary reference W.w. Grainger, Inc. Div Government Sales Division |
| 1P805 | 5/9 Secondary reference W.w. Grainger, Inc. Div Government Sales Division |
NSN 4320-01-321-9961 is a Pump Unit,centrifugal, manufactured by W.w. Grainger, Inc. Div Government Sales Division, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-321-9961 has 1 manufacturer part number on file: 12U595 (W.w. Grainger, Inc. Div Government Sales Division).
Key specifications for 12U595: Discharge Connection Quantity: 1; Phase: SINGLE; Intake Connection Type: THREADED EXTERNAL; Frequency in Hertz: 60.0. 29 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.