The Pump Unit,centrifugal, cataloged under National Stock Number 4320-01-274-0438, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is M.t. Davidson Company. Government technical data includes 30 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-274-0438 |
| Primary Part Number | GCP-820 |
| Item Name | Pump Unit,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | M.t. Davidson Company |
| 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 | HORIZONTAL |
| Prime Mover Power Rating | 7.500 HORSEPOWER |
| Unpackaged Unit Length | 28.500 INCHES NOMINAL IN |
| Centrifugal Pump Impeller Quantity | 1 |
| Voltage in Volts | 440.0 |
| Prime Mover Quantity | 1 |
| Centrifugal Pump Impeller Suction Type | SINGLE |
| Operating Speed at Rated Capacity | 3535.0 REVOLUTIONS PER MINUTE |
| Pump Quantity | 1 |
| Unpackaged Unit Width | 15.7500 INCHES NOMINAL IN |
| Prime Mover Cooling Medium | AIR |
| Specification/standard Data | 81349-MIL-P-17840B GOVERNMENT SPECIFICATION AND 34293-L53205-2 MANUFACTURERS SPECIFICATION |
| Unpackaged Unit Height | 14.688 INCHES NOMINAL IN |
| Stage Quantity | 1 |
| Discharge Pressure | 0.0 LOW VOLATILE ORGANIC COMPOUND - CONSUMER PRODUCTS - ANTIPERSPIRANTS AND DEODORANTS |
| Maximum Discharge Flow Rate | 14.0 GALLONS PER MINUTE |
| Discharge Connection Type | ROUND FLANGE |
| Intake Connection Quantity | 1 |
| Prime Mover Type | ELECTRIC MOTOR |
| Media for Which Designed | WATER, FRESH |
| Mounting Type | BASE |
| Centrifugal Pump Design | MIXED FLOW |
| Total Head | 185.000 FEET FT |
| Current Rating in Amps | 12.7 |
| 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 |
|---|---|
| GCP-820 PRIMARY | M.t. Davidson Company (USA) |
| Reference | Meaning |
|---|---|
| MIL-P-17840 | 4/1 Identification reference U.S. Government activity |
| L53205-2 | 5/1 Secondary reference Huntington Ingalls Incorporated Div Ingalls Shipbuilding |
NSN 4320-01-274-0438 is a Pump Unit,centrifugal, manufactured by M.t. Davidson Company, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-274-0438 has 1 manufacturer part number on file: GCP-820 (M.t. Davidson Company).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-281-1105. Verify interchangeability with system specifications before substitution.
Key specifications for GCP-820: Discharge Connection Quantity: 1; Phase: THREE; Intake Connection Type: ROUND FLANGE; Frequency in Hertz: 60.0. 30 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.